CPLM 1.0 - Compendium of Protein Lysine Modification
TagContent
CPLM ID CPLM-015590
UniProt Accession
Genbank Protein ID
Genbank Nucleotide ID
Protein Name
 Speckle-type POZ protein 
Protein Synonyms/Alias
 HIB homolog 1; PDX-1 C-terminal-interacting factor 1 
Gene Name
 Spop 
Gene Synonyms/Alias
 Pcif1 
Created Date
 July 27, 2013 
Organism
 Mus musculus (Mouse) 
NCBI Taxa ID
 10090 
Lysine Modification
Position
Peptide
Type
References
110KFSILNAKGEETKAMubiquitination[1]
Reference
 [1] Proteomic analyses reveal divergent ubiquitylation site patterns in murine tissues.
 Wagner SA, Beli P, Weinert BT, Schölz C, Kelstrup CD, Young C, Nielsen ML, Olsen JV, Brakebusch C, Choudhary C.
 Mol Cell Proteomics. 2012 Dec;11(12):1578-85. [PMID: 22790023
Functional Description
 Component of a cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex that mediates the ubiquitination of target proteins, leading most often to their proteasomal degradation. The cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex containing homodimeric SPOP has higher ubiquitin ligase activity than the complex that contains the heterodimer formed by SPOP and SPOPL (By similarity). In complex with CUL3, involved in ubiquitination and proteasomal degradation of BRMS1, DAXX, PDX1/IPF1, GLI2 and GLI3. In complex with CUL3, involved in ubiquitination of H2AFY and BMI1; this does not lead to their proteasomal degradation. Inhibits transcriptional activation of PDX1/IPF1 targets, such as insulin, by promoting PDX1/IPF1 degradation. 
Sequence Annotation
 DOMAIN 31 161 MATH.
 DOMAIN 200 267 BTB.
 REGION 71 191 Required for nuclear localization (By
 REGION 123 133 Important for binding substrate proteins
 REGION 186 217 Important for homodimerization (By
 REGION 297 355 Important for homodimerization (By  
Keyword
 Complete proteome; Nucleus; Reference proteome; Ubl conjugation pathway. 
Sequence Source
 UniProt (SWISSPROT/TrEMBL); GenBank; EMBL 
Protein Length
 374 AA 
Protein Sequence
MSRVPSPPPP AEMSSGPVAE SWCYTQIKVV KFSYMWTINN FSFCREEMGE VIKSSTFSSG 60
ANDKLKWCLR VNPKGLDEES KDYLSLYLLL VSCPKSEVRA KFKFSILNAK GEETKAMESQ 120
RAYRFVQGKD WGFKKFIRRD FLLDEANGLL PDDKLTLFCE VSVVQDSVNI SGQNTMNMVK 180
VPECRLADEL GGLWENSRFT DCCLCVAGQE FQAHKAILAA RSPVFSAMFE HEMEESKKNR 240
VEINDVEPEV FKEMMCFIYT GKAPNLDKMA DDLLAAADKY ALERLKVMCE DALCSNLSVE 300
NAAEILILAD LHSADQLKTQ AVDFINYHAS DVLETSGWKS MVVSHPHLVA EAYRSLASAQ 360
CPFLGPPRKR LKQS 374 
Gene Ontology
 GO:0031463; C:Cul3-RING ubiquitin ligase complex; ISS:UniProtKB.
 GO:0016607; C:nuclear speck; IDA:MGI.
 GO:0043161; P:proteasomal ubiquitin-dependent protein catabolic process; ISS:UniProtKB.
 GO:0042787; P:protein ubiquitination involved in ubiquitin-dependent protein catabolic process; IDA:MGI. 
Interpro
 IPR000210; BTB/POZ-like.
 IPR011333; BTB/POZ_fold.
 IPR013069; BTB_POZ.
 IPR002083; MATH.
 IPR008974; TRAF-like. 
Pfam
 PF00651; BTB
 PF00917; MATH 
SMART
 SM00225; BTB
 SM00061; MATH 
PROSITE
 PS50097; BTB
 PS50144; MATH 
PRINTS