PSMA8 - Proteasome subunit alpha type-7-like - human protein (Function)
 
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Protein
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PSMA8 »  Proteasome subunit alpha type-7-like   [ EC 3.4.25.1 ]
 
Gene name:  PSMA8
Family name: Peptidase T1A
Entry whose protein(s) existence is based on evidence at protein level
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Function

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Overview 
Component of the spermatoproteasome, a form of the proteasome specifically found in testis that promotes degradation of histones, thereby participating actively to the exchange of histones during spermatogenesis. The proteasome is a multicatalytic proteinase complex which is characterized by its ability to cleave peptides with Arg, Phe, Tyr, Leu, and Glu adjacent to the leaving group at neutral or slightly basic pH (By similarity).  
  • CuratedUniProtKB
GO molecular function 
Threonine-type endopeptidase activitydefinition[GO:0004298]  
  • IEAUniProtKB KW
Enzymatic activity 
This protein acts as an enzyme. It is known to catalyze the following reaction
EC 3.4.25.1: Cleavage of peptide bonds with very broad specificity.  
  • CuratedUniProtKB
 
More information is available from:
Pathways 
According to KEGG, this protein belongs to the following pathway:
Proteasome  hsa03050+143471  
According to Reactome, this protein belongs to the following pathways:
Activation of NF-kappaB in B cells  REACT_118656  
Antigen processing: Ubiquitination & Proteasome degradation  REACT_75842  
APC/C:Cdc20 mediated degradation of Securin  REACT_6871  
APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1  REACT_6761  
Asymmetric localization of PCP proteins  REACT_172638  
AUF1 (hnRNP D0) destabilizes mRNA  REACT_25325  
Autodegradation of the E3 ubiquitin ligase COP1  REACT_20549  
CDK-mediated phosphorylation and removal of Cdc6  REACT_1221  
CDT1 association with the CDC6:ORC:origin complex  REACT_1949  
Cross-presentation of soluble exogenous antigens (endosomes)  REACT_111056  
degradation of AXIN  REACT_200766  
degradation of DVL  REACT_200841  
ER-Phagosome pathway  REACT_111178  
Orc1 removal from chromatin  REACT_1156  
Regulation of activated PAK-2p34 by proteasome mediated degradation  REACT_13464  
Regulation of ornithine decarboxylase (ODC)  REACT_13565  
SCF-beta-TrCP mediated degradation of Emi1  REACT_6821  
Separation of Sister Chromatids  REACT_150471  
Ubiquitin Mediated Degradation of Phosphorylated Cdc25A  REACT_1614  
Ubiquitin-dependent degradation of Cyclin D1  REACT_4  
Vif-mediated degradation of APOBEC3G  REACT_9453  
Vpu mediated degradation of CD4  REACT_9031  
 

Keywords

Molecular function 
Hydrolase  definition   [KW-0378]
Protease  definition   [KW-0645]
Threonine protease  definition   [KW-0888]
Technical term 
Reference proteome  definition   [KW-1185]
 

Further external links

GenomeRNAi: 143471
PRO: PR:Q8TAA3