Leta i den här bloggen


tisdag 26 november 2019

F-box proteiinien assosioituminen syöpään

2014 Apr;14(4):233-47. doi: 10.1038/nrc3700.
Roles of F-box proteins in cancer.
Abstract
F-box proteins, which are the substrate-recognition subunits of SKP1-cullin 1-F-box protein (SCF) E3 ligase complexes, have pivotal roles in multiple cellular processes through ubiquitylation and subsequent degradation of target proteins. Dysregulation of F-box protein-mediated proteolysis leads to human malignancies. Notably, inhibitors that target F-box proteins have shown promising therapeutic potential, urging us to review the current understanding of how F-box proteins contribute to tumorigenesis. As the physiological functions for many of the 69 putative F-box proteins remain elusive, additional genetic and mechanistic studies will help to define the role of each F-box protein in tumorigenesis, thereby paving the road for the rational design of F-box protein-targeted anticancer therapies.
PMID:
24658274
PMCID:
PMC4306233
DOI:
10.1038/nrc3700
[Indexed for MEDLINE]
Free PMC Article

lördag 16 november 2019

Artikkeli animaalisista BTB/Kelch proteiineista . Kelch toiston omaavan superperheen fylogeniaa.

BMC Bioinformatics
, 4:42 | Cite as
Molecular phylogeny of the kelch-repeat superfamily reveals an expansion of BTB/kelch proteins in animals Authors Soren Prag, Josephine C Adams, .Dept. of Cell Biology, Lerner Research InstituteCleveland Clinic FoundationClevelandUSA
Open Access
Research article



Abstract. Background
The kelch motif is an ancient and evolutionarily-widespread sequence motif of 44–56 amino acids in length. It occurs as five to seven repeats that form a β-propeller tertiary structure. Over 28 kelch-repeat proteins have been sequenced  (2003) and functionally characterised from diverse organisms spanning from viruses, plants and fungi to mammals and it is evident from expressed sequence tag, domain and genome databases that many additional hypothetical proteins contain kelch-repeats. In general, kelch-repeat β-propellers are involved in protein-protein interactions, however the modest sequence identity between kelch motifs, the diversity of domain architectures, and the partial information on this protein family in any single species, all present difficulties to developing a coherent view of the kelch-repeat domain and the kelch-repeat protein superfamily. To understand the complexity of this superfamily of proteins, we have analysed by bioinformatics the complement of kelch-repeat proteins encoded in the human genome and have made comparisons to the kelch-repeat proteins encoded in other sequenced genomes.

Results  We identified 71 kelch-repeat proteins encoded in the human genome, whereas 5 or 8 members were identified in yeasts and around 18 in C. elegans, D. melanogaster and A. gambiae. Multiple domain architectures were identified in each organism, including previously unrecognised forms. The vast majority of kelch-repeat domains are predicted to form six-bladed β-propellers. The most prevalent domain architecture in the metazoan animal genomes studied was the BTB/kelch domain organisation and we uncovered 3 subgroups of human BTB/kelch proteins. Sequence analysis of the kelch-repeat domains of the most robustly-related subgroups identified differences in β-propeller organisation that could provide direction for experimental study of protein-binding characteristics.

Conclusion The kelch-repeat superfamily constitutes a distinct and evolutionarily-widespread family of β-propeller domain-containing proteins. Expansion of the family during the evolution of multicellular animals is mainly accounted for by a major expansion of the BTB/kelch domain architecture. BTB/kelch proteins constitute 72 % of the kelch-repeat superfamily of H. sapiens and form three subgroups, one of which appears the most-conserved during evolution. Distinctions in propeller blade organisation between subgroups 1 and 2 were identified that could provide new direction for biochemical and functional studies of novel kelch-repeat proteins.

Keywords
Domain Architecture Galactose Oxidase Biology Workbench Eucaryotic Organism Identity Consensus Sequence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Abbreviations

BLAST
basic local alignment search tool
BTB/POZ
Broad-Complex, Tramtrack, and Bric-a-Brac/ Poxvirus and Zincfinger domain
CDD
conserved domain database
EST
expressed sequence tag
ORF
open reading frame, Pfam, Protein families database of alignments and HMMs
SMART
simple modular architecture research tool.



ATRN (20p13), MGCA, DPPT-L, Attractiini

https://www.ncbi.nlm.nih.gov/gene/8455
Official Full Name
attractinAlso known as
MGCA; DPPT-L
Summary
This gene encodes both membrane-bound and secreted protein isoforms. A membrane-bound isoform exhibits sequence similarity with the mouse mahogany protein, a receptor involved in controlling obesity. A secreted isoform is involved in the initial immune cell clustering during inflammatory responses that may regulate the chemotactic activity of chemokines. [provided by RefSeq, Apr 2016]
Expression
Ubiquitous expression in duodenum (RPKM 20.8), thyroid (RPKM 17.2) and 25 other tissues See more

Tietoa MEGF8 geenin taustasta



  • C19orf49
  • EGF-like domain-containing protein 4
  • EGF-like-domain, multiple 4
  • EGFL4
  • epidermal growth factor-like protein 4
  • FLJ22365
  • HBV pre-s2 binding protein 1
  • MEGF8_HUMAN
  • multiple EGF-like-domains 8
  • multiple epidermal growth factor-like domains protein 8
  • SBP1
https://www.researchgate.net/publication/24011705_Massively_parallel_sequencing_identifies_the_gene_Megf8_with_ENU-induced_mutation_causing_heterotaxy

Abstract
Forward genetic screens with ENU (N-ethyl-N-nitrosourea) mutagenesis can facilitate gene discovery, but mutation identification is often difficult. We present the first study in which an ENU-induced mutation was identified by massively parallel DNA sequencing. This mutation causes heterotaxy and complex congenital heart defects and was mapped to a 2.2-Mb interval on mouse chromosome 7. Massively parallel sequencing of the entire 2.2-Mb interval identified 2 single-base substitutions, one in an intergenic region and a second causing replacement of a highly conserved cysteine with arginine (C193R) in the gene Megf8. Megf8 is evolutionarily conserved from human to fruit fly, and is observed to be ubiquitously expressed. Morpholino knockdown of Megf8 in zebrafish embryos resulted in a high incidence of heterotaxy, indicating a conserved role in laterality specification. Megf8(C193R) mouse mutants show normal breaking of symmetry at the node, but Nodal signaling failed to be propagated to the left lateral plate mesoderm. Videomicroscopy showed nodal cilia motility, which is required for left-right patterning, is unaffected. Although this protein is predicted to have receptor function based on its amino acid sequence, surprisingly confocal imaging showed it is translocated into the nucleus, where it is colocalized with Gfi1b and Baf60C, two proteins involved in chromatin remodeling. Overall, through the recovery of an ENU-induced mutation, we uncovered Megf8 as an essential regulator of left-right patterning.

 https://link.springer.com/article/10.1186/1471-2105-4-42 
Tästä saa fylogeneettisen tiedon. BTB Kelch domeeniproteiineista.


(https://ghr.nlm.nih.gov/gene/MEGF8 
Uusimpia artikkeleita lokakuulta 2019)

Normal Function

The MEGF8 gene provides instructions for making a protein whose function is unclear. Based on its structure, the Megf8 protein may be involved in cell processes such as attaching cells to one another (cell adhesion) and helping proteins interact with each other. Researchers also suspect that the Megf8 protein plays a role in the normal shaping (patterning) of many parts of the body during embryonic development.

Other Names for This Gene



  • C19orf49
  • EGF-like domain-containing protein 4
  • EGF-like-domain, multiple 4
  • EGFL4
  • epidermal growth factor-like protein 4
  • FLJ22365
  • HBV pre-s2 binding protein 1
  • MEGF8_HUMAN
  • multiple EGF-like-domains 8
  • multiple epidermal growth factor-like domains protein 8
  • SBP1

MEGF8 (19q13.2) , 12 kelch-toistoa, monta EGF-kaltaista domaania, ec domaanin CUB , plasmod Pvs28 ja vWFA domaanit omaava iso proteiini

https://www.ncbi.nlm.nih.gov/gene/1954
(En ole tavannut aiemmin sellaista proteiinia tästä  Kelch-superperheestä, jossa olisi näin monta kelch-toistoa(12).  Onkohan se geenirekombinaatio  jokin hybridi fylogeneettisesti kun siinä on kahden  Kelch-proteiini verran kelch-domeeneja ? Katson jos löydän fylogeneettistä tietoa)

Peptidisekvenssi on 2845 aa.  Proteiinilla on extrasellulaarinen CUB-domeeni (a.a. 49-1399 , N terminaalin lähellä. Transmembraaninen jakso on C-terminaalissa (2648-2845 a.a.)  EGF-kaltaisia domeeneja on useita. Löytyy myös PSI,  plexiinitoisto (A.A. 950- 988)  ja Plasmod-Pvs28 domeeni (a.a. 2189-2314 ) (plasmodium ookineetin pintaproteiini, jonka kaltaisesta on  kehitelty  rokotetta plasmodium vivaxtyyppiä vastaan). Sitten löytyy von Willebrand faktoriA- tyyppinen domeeni, jonka kaltaista alunperin havaittiin  hyytymistekijöistä.
 Kelch-toistot  kelch-3 ja Kelch neljä ovat  galaktoosioksidaasidomeeneja.
Geeniä ilmenee  runsaiten aivossa ja rasvakudoksessa. Sen puutteet  tunnetaan kliinisenä  oireyhtymänä Carpenter syndroma 2:na,  jossa on mm.  kehon lateralisaatiomallin  muuttumisia,kuten sydän oikealla puolella.https://www.norio-keskus.fi/tietoa/diagnoosikohtaista-tietoa/carpenterin-oireyhtyma.html
Carpenterin oireyhtymätyyppi 1:n geneettinen poikkeavuus on paikannettu kromosomiin 6 (6p12.1-p11.2), RAB23-nimiseen geeniin. Carpenterin oireyhtymän tyyppi 2 aiheutuu puolestaan MEGF8-geenin mutaatiosta kromosomissa 19 (19q13.2).
Molemmat Carpenterin oireyhtymätyypit noudattavat autosomissa resessiivistä eli peittyvää periytymistapaa.
Carpenterin oireyhtymän tyyppi 1 on yleisempi kuin tyyppi 2. Carpenterin oireyhtymän kokonaisesiintyvyydeksi on arvioitu 1 : 1 000 000. Lääketieteellinen kirjallisuus kuvaa yli 70 potilasta. Kaikissa tapauksissa vanhemmat ovat olleet terveitä, mikä viittaa oireyhtymän syntyneen biologisesti sattumalta, aivan uuden, nk. de novo-mutaation seurauksesta. De novo-mutaatiot saavat alkunsa hedelmöitykseen osallistuvan sukusolun, munasolun tai siittiön, kypsyessä tai alkion varhaisten solunjakautumisten yhteydessä pian hedelmöityksen jälkeen.

Official Full Name
multiple EGF like domains 8
Also known as
SBP1; CRPT2; EGFL4; C19orf49
CRPT2 ( Carpenter syndrome 2)
Summary
The protein encoded by this gene is a single-pass type I membrane protein of unknown function that contains several EGF-like domains, Kelch repeats, and PSI domains. Defects in this gene are a cause of Carpenter syndrome 2. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]
Expression
Ubiquitous expression in brain (RPKM 10.9), fat (RPKM 6.9) and 25 other tissues See more
Preferred Names
multiple epidermal growth factor-like domains protein 8
Names
EGF-like domain-containing protein 4
EGF-like-domain, multiple 4
HBV pre-S2-binding protein 1
HBV pre-s2 binding protein 1
epidermal growth factor-like protein 4
hepatitis B virus pre-S2-binding protein 1
.

What's a GeneRIF?

fredag 15 november 2019

BTBD29,LZTR1(22q11.21;22q11.1-q11.2), SWNTS2, NS1, NS2. Golgiverkoston vakautus.

https://www.ncbi.nlm.nih.gov/gene/8216
Leusine Zipper like transcription regulator 1 = LZTR1
Also known as
NS2; NS10; BTBD29; LZTR-1; SWNTS2
Summary
This gene encodes a member of the BTB-kelch superfamily. Initially described as a putative transcriptional regulator based on weak homology to members of the basic leucine zipper-like family, the encoded protein subsequently has been shown to localize exclusively to the Golgi network where it may help stabilize the Gogli complex. Deletion of this gene may be associated with DiGeorge syndrome. [provided by RefSeq, Jul 2008]
Expression  Ubiquitous expression in spleen (RPKM 12.6), ovary (RPKM 12.5) and 25 other tissues See more
 
Preferred Names
leucine-zipper-like transcriptional regulator 1
Names
epididymis secretory sperm binding protein
NS2, NS10, Noonan syndrome types
SWNTS2  Schwannoma

GeneRIFs: Gene References Into Functions

What's a GeneRIF?


KLHDC8A(1q32.1). S-Delta-E1

https://www.ncbi.nlm.nih.gov/protein/NP_001258792.1


Aliases for KLHDC8A Gene

  • Kelch Domain Containing 8A 2 3 5
  • Substitute For Delta-EGFR Expression 1 3 4
  • Kelch Domain-Containing Protein 8A 3 4
  • S-Delta-E1 3 4

KLHDC8B (3p21.31), CHL, on tärkeä genomin vakaudelle ja suojaa mitoosivirheiltä ja ,sentrosomiamplifikaatiolta

https://www.ncbi.nlm.nih.gov/gene/200942
Tämä Kelch-superperheen jäsen  suojelee mitoottisilta virheiltä, sentrosomien  amplifikaatioilta ja kromosomaaliselta  epävakaudelta (2012). Tämän KLHDC8B:n mutaatio assosioituu Hodginin lymfoomaan ja siinä tavattaviin binukleaarisiin Reed-Stenberg-soluihin.


Entrez Gene Summary for KLHDC8B Gene
  • This gene encodes a protein which forms a distinct beta-propeller protein structure of kelch domains allowing for protein-protein interactions. Mutations in this gene have been associated with Hodgkin lymphoma. [provided by RefSeq, Sep 2010]
GeneCards Summary for KLHDC8B Gene
KLHDC8B (Kelch Domain Containing 8B) is a Protein Coding gene. Diseases associated with KLHDC8B include Lymphoma, Hodgkin, Classic and Hodgkin's Lymphoma, Nodular Sclerosis. An important paralog of this gene is KLHDC8A.

UniProtKB/Swiss-Prot Summary for KLHDC8B Gene
  • Involved in pinching off the separated nuclei at the cleavage furrow and in cytokinesis (PubMed:20107318). Required for mitotic integrity and maintenance of chromosomal stability. Protects cells against mitotic errors, centrosomal amplification, micronucleus formation and aneuploidy. Plays a key role of midbody function involving abscission of the daughter cells during cytokinesis and appropriate chromosomal and nuclear segregation into the daughter cells (PubMed:22988245, PubMed:23713010).

söndag 10 november 2019

Dyneiini ja kinesiini

 Kinesiini ja dyneiini

https://www.bing.com/videos/search?q=kinesin%2c+dynein&&view=detail&mid=0FAA756157B24BC7765C0FAA756157B24BC7765C&&FORM=VDRVRV

Dyneiinistä

https://www.bing.com/videos/search?q=kinesin%2c+dynein&&view=detail&mid=ECD8D5D1C4C290B80D5AECD8D5D1C4C290B80D5A&&FORM=VRDGAR

Mikrotubuluksista

What Holds a Cell Together?

https://study.com/academy/lesson/microtubules-definition-functions-structure.html

Just as our skeletons give our bodies' structure and shape, the cytoskeleton gives cells structure and shape. The cytoskeleton is responsible for lots of important cellular functions:
  • It allows cells to move
  • Engulf particles
  • Brace themselves against pulling forces
  • Transport vesicles through the cytosol
  • Separate chromosomes during cell division
  • Allows our muscles to contract
Clearly, things just wouldn't be the same without the cytoskeleton.
In eukaryotic cells, the cytoskeleton is made up of three major kinds of filaments: actin filaments, intermediate filaments (IF), and microtubules. Each of these filaments is a polymer, meaning that it is made up of many single subunits, like a child's building blocks snapped together to form a long chain. The subunits are called monomers, and each type of cytoskeletal filament is built out of a different kind of monomer.
The polymeric structure of cytoskeletal filaments means that they can be disassembled and rearranged at any time. This means that the cell can respond to signals in its environment and rapidly change its shape, motion, or attachment accordingly. You can imagine it like this: if the buildings in a city were made out of easily rearranged monomers, it would be easy to take them down and make new buildings in different places. We usually don't need to do this, but our cells do!
In this lesson, we'll focus on one type of cytoskeletal filament, microtubules, and learn about their structure and functions within the cell.

Microtubule Structure

Microtubules are the largest cytoskeletal filaments in cells, with a diameter of 25 nanometers. They are made out of subunits called tubulin. Each tubulin subunit is made up of one alpha and one beta tubulin that are attached to each other, so technically tubulin is a heterodimer, not a monomer. As you can see, it really does look like a tube, hence the name micro'tubule.'
In a microtubule structure, tubulin monomers are linked both at their ends and along their sides (laterally). This means that microtubules are quite stable along their lengths. Imagine that you have some plastic building blocks that are all identical and can attach to each other both at their ends and laterally. If you arranged them into a microtubule structure, and then wanted to take the structure apart, you can imagine that it would be really hard to take it apart somewhere in the middle, because how would you get the first block out? If you wanted to take it apart, you'd have to start at the ends. And indeed, this is how microtubules are assembled and disassembled, only from their ends.

Plus and Minus Ends

Since the tubulin subunits are always linked in the same direction, microtubules have two distinct ends, called the plus (+) and minus (-) ends. On the minus end, alpha tubulin is exposed, and on the plus end, beta tubulin is exposed.
Microtubules preferentially assemble and disassemble at their plus ends. An important consequence of this fact is that microtubule minus ends can be clustered together in a so-called microtubule-organizing center, or centrosome. The centrosome stays stable as the plus ends of the microtubules grow and shrink.
Microtubules are used in many important cellular functions.

KLHL25 substraattiadaptorin substraatti on ACLY, ATP: citraatti lyaasi, jonk se lähettää silppuriin.

What's a GeneRIF?

fredag 8 november 2019

CENP-E (4q24), KIF10, MCPH13, PPP1R61.

https://www.ncbi.nlm.nih.gov/gene/1062

Official Symbol
CENPE
centromere protein E
Also known as
KIF10; CENP-E; MCPH13; PPP1R61
Summary
Centrosome-associated protein E (CENPE) is a kinesin-like motor protein that accumulates in the G2 phase of the cell cycle. Unlike other centrosome-associated proteins, it is not present during interphase and first appears at the centromere region of chromosomes during prometaphase. This protein is required for stable spindle microtubule capture at kinetochores which is a necessary step in chromosome alignment during prometaphase. This protein also couples chromosome position to microtubule depolymerizing activity. Alternative splicing results in multiple transcript variants encoding distinct protein isoforms. [provided by RefSeq, Nov 2014]
Expression
Broad expression in bone marrow (RPKM 3.4), lymph node (RPKM 3.3) and 18 other tissues See more
Orthologs
 
11.
Huang Y, Lin L, Liu X, Ye S, Yao PY, Wang W, Yang F, Gao X, Li J, Zhang Y, Zhang J, Yang Z, Liu X, Yang Z, Zang J, Teng M, Wang Z, Ruan K, Ding X, Li L, Cleveland DW, Zhang R, Yao X.
Cell Res. 2019 Jul;29(7):562-578. doi: 10.1038/s41422-019-0178-z. Epub 2019 Jun 14.
Error-free mitosis depends on accurate chromosome attachment to spindle microtubules, powered congression of those chromosomes, their segregation in anaphase, and assembly of a spindle midzone at mitotic exit. The centromere-associated kinesin motor CENP-E, whose binding partner is BubR1, has been implicated in congression of misaligned chromosomes and the transition from lateral kinetochore-microtubule association to end-on capture. Although previously proposed to be a pseudokinase, here we report the structure of the kinase domain of Drosophila melanogaster BubR1, revealing its folding into a conformation predicted to be catalytically active. BubR1 is shown to be a bona fide kinase whose phosphorylation of CENP-E switches it from a laterally attached microtubule motor to a plus-end microtubule tip tracker. Computational modeling is used to identify bubristatin as a selective BubR1 kinase antagonist that targets the αN1 helix of N-terminal extension and αC helix of the BubR1 kinase domain. Inhibition of CENP-E phosphorylation is shown to prevent proper microtubule capture at kinetochores and, surprisingly, proper assembly of the central spindle at mitotic exit. Thus, BubR1-mediated CENP-E phosphorylation produces a temporal switch that enables transition from lateral to end-on microtubule capture and organization of microtubules into stable midzone arrays.
 

torsdag 7 november 2019

IDE( 10q23.33) Sinkkimetalloendopeptidaasi,insuliinia hajoittava entsyymi IDE

 IDE(10q23.33)
https://www.ncbi.nlm.nih.gov/gene/3416
Official Symbol
IDEprovided by HGNC
Official Full Name
insulin degrading enzyme
Primary source
Also known as
INSULYSIN
Summary
This gene encodes a zinc metallopeptidase that degrades intracellular insulin, and thereby terminates insulins activity, as well as participating in intercellular peptide signalling by degrading diverse peptides such as glucagon, amylin, bradykinin, and kallidin. The preferential affinity of this enzyme for insulin results in insulin-mediated inhibition of the degradation of other peptides such as beta-amyloid. Deficiencies in this protein's function are associated with Alzheimer's disease and type 2 diabetes mellitus but mutations in this gene have not been shown to be causitive for these diseases. This protein localizes primarily to the cytoplasm but in some cell types localizes to the extracellular space, cell membrane, peroxisome, and mitochondrion. Alternative splicing results in multiple transcript variants encoding distinct isoforms. Additional transcript variants have been described but have not been experimentally verified.[provided by RefSeq, Sep 2009]
Expression Ubiquitous expression in skin (RPKM 17.4), testis (RPKM 9.9) and 25 other tissues See more
Preferred Names
insulin-degrading enzyme
Names
Abeta-degrading protease
insulin protease
insulinase
 Ref.
2015 Jul 17;10(7):e0132455. doi: 10.1371/journal.pone.0132455. eCollection 2015. Proteasome Activity Is Affected by Fluctuations in Insulin-Degrading Enzyme Distribution.
Sbardella D1, Tundo GR1,et.el. 1.
Abstract
Insulin-Degrading-Enzyme (IDE) is a Zn2+-dependent peptidase highly conserved throughout evolution and ubiquitously distributed in mammalian tissues wherein it displays a prevalent cytosolic localization. We have recently demonstrated a novel Heat Shock Protein-like behaviour of IDE and its association with the 26S proteasome. In the present study, we examine the mechanistic and molecular features of IDE-26S proteasome interaction in a cell experimental model, extending the investigation also to the effect of IDE on the enzymatic activities of the 26S proteasome. Further, kinetic investigations indicate that the 26S proteasome activity undergoes a functional modulation by IDE through an extra-catalytic mechanism. The IDE-26S proteasome interaction was analyzed during the Heat Shock Response and we report novel findings on IDE intracellular distribution that might be of critical relevance for cell metabolism.

2 results
  1. Insulin Inhibits the Ubiquitin-Dependent Degrading ...

    https://www.researchgate.net/publication/12444208_Insulin_Inhibits_the_Ubiquitin...
    Insulin Inhibits the Ubiquitin-Dependent Degrading ...A major metabolic effect of insulin is inhibition of cellular proteolysis, but the proteolytic systems involved are unclear. Tissues have multiple proteolytic systems, including the ATP- and ubiquitin-dependent proteasome pathway. The effect of insulin on this pathway was examined in vitro and in cultured cells. Insulin inhibited ATP- and ubiquitin-dependent lysozyme degradation more than 90% by reticulocyte extract, in a dose-dependent manner (IC50 approximately 50 nM). Insulin did not reduce the conjugation of ubiquitin to lysozyme and was not itself ubiquitin-conjugated. In HepG2 cells, insulin increased ubiquitin-conjugate accumulation 80%. The association between the 26S proteasome and an intracellular protease, the insulin-degrading enzyme (IDE), was examined by a purification scheme designed to enrich for the 26S proteasome. Copurification of IDE activity and immunoreactivity with the proteasome were detected through several chromatographic steps. Glycerol gradient analysis revealed cosedimentation of IDE with the 20S proteasome and possibly with the 26S proteasome. The proteasome-associated IDE was displaced when the samples were treated with insulin. These results suggest that insulin regulates protein catabolism, at least in part, by decreasing ubiquitin-mediated proteasomal activity, and provides a new target for insulin action. The displacement of IDE from the proteasome provides a mechanism for this insulin action.

    ... IDE and the proteasome co-purify through a number of chromatographic steps (Duckworth et al. 1994, Bennett et al. 2000b). When IDE is either removed from the proteasome or inhibited, insulin has no influence on proteasome activity (Duckworth et al. 1994, 1998a, Hamel et al. 1998). ...

    Miten insulinolysiini hajoittaa insuliinia koska insuliini ei ubikitinoidu ja ole proteosomaalisesti hajoitettavissa, vaan IDE-kombinoituu proteosomaalisiin osiin ja insuliini säätelee  sen avulla proteosomaalista funktiota. 
  2. Insulin-degrading enzyme (IDE): A novel heat shock-like ...
    https://www.researchgate.net/publication/233789522_Insulin-degrading_enzyme_IDE_A...
    Insulin-degrading enzyme (IDE) is a highly conserved zinc metallopeptidase that is ubiquitously distributed in human tissues, and particularly abundant in the brain, liver, and muscles. IDE activity has been historically associated with insulin and β-amyloid catabolism. However, over the last decade, several experimental findings have established that IDE is also involved in a wide variety of physiopathological processes, including ubiquitin clearance and Varicella Zoster Virus infection. In this study, we demonstrate that normal and malignant cells exposed to different stresses markedly up-regulate IDE in a heat shock protein (HSP)-like fashion. Additionally, we focused our attention on tumor cells and report that (i) IDE is overexpressed in vivo in tumors of the central nervous system (CNS); (ii) IDE-silencing inhibits neuroblastoma (SHSY5Y) cell proliferation and triggers cell death; (iii) IDE inhibition is accompanied by a decrease of the poly-ubiquitinated protein content and co-immunoprecipitates with proteasome and ubiquitin in SHSY5Y cells. In this work, we propose a novel role for IDE as a heat shock protein with implications in cell growth regulation and cancer progression, thus opening up an intriguing hypothesis of IDE as an anticancer target.

     Artikkeli vuodelta 1983: insulinolyysiksestä https://www.ncbi.nlm.nih.gov/pubmed/?term=insulinolysin
 

onsdag 6 november 2019

Keskushermostossa expressoituvat Kelch-proteiinit

Katson näistä tähän luetteloa, mutta siirrän tekstin sitten  Muisti Memory blogiin, jossa on aivoa käsittelevää asiaa.
  • KLHL1, MRP2, MAYVEN related protein (13.q21.33) , Oligodendroglioille spesifinen. Excitabiliteettia edistävä.
  • KLHL2, MAYVEN, Kainaattireseptorien säätely
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929045/

  • KLHL16, GAN (16q23.2), Neuronien ja fibroblastien IF filamenttien  hajoitus. Gigaxoniini.  Mutaatioista seuraa axonineuropatiaproteiinia.
  • KLHL17, Actinphilin, (1p36.33), Kainaattireeptorien säätely.
 https://www.ncbi.nlm.nih.gov/gene/339451#gene-expression 
  • KEAP1, KLHL19.(19p13.2).
  • https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4186766/
https://www.researchgate.net/publication/221850652_Impaired_antioxydative_Keap1Nrf2_system
_and_the_downstream_stress_protein_responses_in_the_motor_neuron_of_ALS_model_mice
  • KLHL37, KLHL35, ENC-1, PIG10, Tumamatrixproteiini NRP/B, Nuclear Restricted Protein, Ectodermal-Neural Cortex protein 1, CCL28, p53-induced gene 10 protein, PIG10, Tumor protein p53 inducible protein 10, TP53I10. Rajoittaa NRF2:n translaatiota ja NRF2:n kohde geenien sen kohdegeenien ilmentymistä(Epäsuorasti mutta KEAP1:stä riippumatta vastavaikuttaa Keap1/NRF2 säätelyyn kenttään siten että tumatasosta rajoittaa NRF2 vastegeenien ilmentymistä ja  mRNA NRF2:n translaatiota NRF2:ksi)