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måndag 20 maj 2019

UBOX tyyppiset E3 ligaasit E4

RING -tyyppisten E3 -ligaasien alaryhmä U-BOX tyyppiset E3 eli
(1) UBOX1, CHIP,
(2) UBOX2, E4A ja E4 ubikitiiniligaasi on E1-, E2-, E3-koordinaattori
(3) UBOX3, E4B .

(1) UBOX1  ( 16p13.3),  E3 ubiquitin-proteine ligase CHIP, STUB1 

STUB1, STIP1 homology and U-box containing protein 1 [ Homo sapiens (human) ] 
Also known as
CHIP; SCA48; UBOX1; SCAR16; HSPABP2; NY-CO-7; SDCCAG7
Summary
This gene encodes a protein containing tetratricopeptide repeat and a U-box that functions as a ubiquitin ligase/cochaperone. The encoded protein binds to and ubiquitinates shock cognate 71 kDa protein (Hspa8) and DNA polymerase beta (Polb), among other targets. Mutations in this gene cause spinocerebellar ataxia, autosomal recessive 16. Alternative splicing results in multiple transcript variants. There is a pseudogene for this gene on chromosome 2. [provided by RefSeq, Jun 2014]
Expression Ubiquitous expression in fat (RPKM 42.9), kidney (RPKM 39.1) and 25 other tissues See more Orthologs mouse all

Preferred Names
E3 ubiquitin-protein ligase CHIP
Names
CLL-associated antigen KW-8
RING-type E3 ubiquitin transferase CHIP
STIP1 homology and U-box containing protein 1, E3 ubiquitin protein ligase
antigen NY-CO-7
carboxy terminus of Hsp70-interacting protein
heat shock protein A binding protein 2 (c-terminal)
serologically defined colon cancer antigen 7
Conserved Domains (3) summary
sd00006
Location:21 → 51
TPR; TPR repeat [structural motif]
pfam12895
Location:3 → 48
ANAPC3; Anaphase-promoting complex, cyclosome, subunit 3
cd16654
Location:155 → 221
RING-Ubox_CHIP; U-box domain, a modified RING finger, found in carboxyl terminus of HSP70-interacting protein (CHIP) and similar proteins

(2) UBOX2 (11q23.2) , UBE4A


https://www.ncbi.nlm.nih.gov/gene/9354

UBE4A ubiquitination factor E4A [ Homo sapiens (human) ]

E4 ubikitiiniligaasi eli U-box ubikitiiniligaasiperhetta, joka osallistuu jmultiubikitiiniketjujen koostamiseen ja on tärkeä kromosomiaineksen tiivistymisessä ja erkanemisissa sekuriinin poluyubikitinaation  avulla.  Autovasta-aineet  ovat merkkareita sklerodermasta ja Crohnin taudista. Muita nimiä E4, UFD2 ja UBOX2.  Tätä ilmenee aivossa ja umpisuolenlisäkkeessä.  
Also known as E4A; ( UFD2 holomog yest); UBOX2
Summary This gene encodes a member of the U-box ubiquitin ligase family. The encoded protein is involved in multiubiquitin chain assembly and plays a critical role in chromosome condensation and separation through the polyubiquitination of securin. Autoantibodies against the encoded protein may be markers for scleroderma and Crohn's disease. A pseudogene of this gene is located on the long arm of chromosome 3. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Feb 2011]
Expression Ubiquitous expression in brain (RPKM 15.5), appendix (RPKM 14.1) and 25 other tissues See more Orthologs  mouse all
Preferred Names
ubiquitin conjugation factor E4 A
Names
RING-type E3 ubiquitin transferase E4 A
ubiquitination factor E4A (UFD2 homolog, yeast)
Conserved Domains (2) summary
pfam10408
Location:330 → 971
Ufd2P_core; Ubiquitin elongating factor core . This is the most conserved part of the core region of Ufd2P ubiquitin elongating factor or E4, running from helix alpha-11 to alpha-38. It consists of 31 helices of variable length connected by loops of variable size forming a compact unit; the helical packing pattern of the compact unit consists of five structural repeats that resemble tandem Armadillo (ARM) repeats. This domain is involved in ubiquitination as it binds Cdc48p and escorts ubiquitinated proteins from Cdc48p to the proteasome for degradation. The core is structurally similar to the nuclear transporter protein importin-alpha. The core is associated with the U-box at the C-terminus, pfam04564, which has ligase activity
cd16657
Location:990 → 1059
RING-Ubox_UBE4A;
U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and similar proteins
The family includes yeast ubiquitin fusion degradation protein 2 (UFD2p) and its mammalian homolog, UBE4A. Yeast UFD2p, also known as ubiquitin conjugation factor E4 or UB fusion protein 2, is a polyubiquitin chain conjugation factor (E4) in the ubiquitin fusion degradation (UFD) pathway which catalyzes elongation of the ubiquitin chain through Lys48 linkage. It binds to substrates conjugated with one to three ubiquitin molecules and catalyzes the addition of further ubiquitin moieties in the presence of ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzyme (E2) and ubiquitin ligase (E3), yielding

(3) UBOX3 (1p36.22), UBE4B

Tämäkin proteiini on niitä RING-tyyppisten E3-ubikitiinitransferaasi  E4 B tyyppinen eli ubikitinaatiofaktori E4B, joilla on se U-box.  Tämä on UBOX3.  Lyhennyksiä kertyy monta tällekin.

https://www.ncbi.nlm.nih.gov/gene/10277

UBE4B ubiquitination factor E4B [ Homo sapiens (human) ] 

Also known as
E4; UFD2; HDNB1; UBOX3; UFD2A
Summary
The modification of proteins with ubiquitin is an important cellular mechanism for targeting abnormal or short-lived proteins for degradation. Ubiquitination involves at least three classes of enzymes: ubiquitin-activating enzymes, or E1s, ubiquitin-conjugating enzymes, or E2s, and ubiquitin-protein ligases, or E3s. This gene encodes an additional conjugation factor, E4, which is involved in multiubiquitin chain assembly. This gene is also the strongest candidate in the neuroblastoma tumor suppressor genes. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
Expression Ubiquitous expression in thyroid (RPKM 12.1), skin (RPKM 10.9) and 25 other tissues See more
Orthologs mouse all
 
Preferred Names
ubiquitin conjugation factor E4 B
Names
RING-type E3 ubiquitin transferase E4 B
UFD2A-III/UBE4B-III splice isoform
homologous to yeast UFD2
homozygously deleted in neuroblastoma-1 (HDNB1)
ubiquitin-fusion degradation protein 2 (UFD2)
ubiquitination factor E4B (UFD2 homolog, yeast)

Yhteenvetona U-box tyyppisistä E3 ligaaseista ”E4 ”







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