UniProtKB - Q61JN8 (SPCS_CAEBR)
Protein
O-phosphoseryl-tRNA(Sec) selenium transferase
Gene
secs-1
Organism
Caenorhabditis briggsae
Status
Functioni
Converts O-phosphoseryl-tRNA(Sec) to selenocysteinyl-tRNA(Sec) required for selenoprotein biosynthesis.By similarity
Catalytic activityi
- H2O + O-phospho-L-seryl-tRNASec + selenophosphate = L-selenocysteinyl-tRNASec + 2 phosphateBy similarityEC:2.9.1.2By similarity
Cofactori
pyridoxal 5'-phosphateBy similarity
: selenocysteinyl-tRNA(Sec) biosynthesis Pathwayi
This protein is involved in step 2 of the subpathway that synthesizes selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (archaeal/eukaryal route).By similarityProteins known to be involved in the 2 steps of the subpathway in this organism are:
- no protein annotated in this organism
- O-phosphoseryl-tRNA(Sec) selenium transferase (secs-1)
View all proteins of this organism that are known to be involved in the subpathway that synthesizes selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (archaeal/eukaryal route), the pathway selenocysteinyl-tRNA(Sec) biosynthesis and in Aminoacyl-tRNA biosynthesis.
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sitei | 68 | May act as a substrate filter by repelling compounds with a negatively charged alpha-carboxylateBy similarity | 1 | |
Binding sitei | 69 | Pyridoxal phosphateBy similarity | 1 | |
Binding sitei | 91 | SubstrateBy similarity | 1 | |
Binding sitei | 92 | SubstrateBy similarity | 1 | |
Binding sitei | 99 | SubstrateBy similarity | 1 | |
Binding sitei | 306 | SubstrateBy similarity | 1 | |
Binding sitei | 388 | tRNA discriminator baseBy similarity | 1 |
GO - Molecular functioni
- identical protein binding Source: EnsemblMetazoa
- transferase activity, transferring selenium-containing groups Source: InterPro
- tRNA binding Source: GO_Central
GO - Biological processi
- selenocysteine incorporation Source: GO_Central
- selenocysteinyl-tRNA(Sec) biosynthetic process Source: UniProtKB-UniPathway
Keywordsi
Molecular function | RNA-binding, Transferase, tRNA-binding |
Biological process | Protein biosynthesis |
Ligand | Pyridoxal phosphate, Selenium |
Enzyme and pathway databases
UniPathwayi | UPA00906;UER00898 |
Names & Taxonomyi
Protein namesi | Recommended name: O-phosphoseryl-tRNA(Sec) selenium transferase (EC:2.9.1.2By similarity)Alternative name(s): Selenocysteine synthase Short name: Sec synthase Selenocysteinyl-tRNA(Sec) synthase Sep-tRNA:Sec-tRNA synthase Short name: SepSecS UGA suppressor tRNA-associated protein homolog |
Gene namesi | Name:secs-1 ORF Names:CBG09712 |
Organismi | Caenorhabditis briggsae |
Taxonomic identifieri | 6238 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Ecdysozoa › Nematoda › Chromadorea › Rhabditida › Rhabditina › Rhabditomorpha › Rhabditoidea › Rhabditidae › Peloderinae › Caenorhabditis |
Proteomesi |
|
Organism-specific databases
WormBasei | CBG09712 ; CBP02336 ; WBGene00031251 ; Cbr-secs-1 |
Subcellular locationi
Cytoplasm and Cytosol
- Cytoplasm By similarity
Other locations
- cytoplasm Source: UniProtKB-SubCell
Keywords - Cellular componenti
CytoplasmPTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000219879 | 1 – 482 | O-phosphoseryl-tRNA(Sec) selenium transferaseAdd BLAST | 482 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 277 | N6-(pyridoxal phosphate)lysineBy similarity | 1 |
Interactioni
Subunit structurei
Homotetramer formed by a catalytic dimer and a non-catalytic dimer serving as a binding platform that orients tRNASec for catalysis. Each tetramer binds the CCA ends of two tRNAs which point to the active sites of the catalytic dimer.
By similarityGO - Molecular functioni
- identical protein binding Source: EnsemblMetazoa
Protein-protein interaction databases
STRINGi | 6238.CBG09712 |
Family & Domainsi
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 1 – 36 | TetramerizationBy similarityAdd BLAST | 36 | |
Regioni | 90 – 100 | Phosphate loop (P-loop)By similarityAdd BLAST | 11 |
Sequence similaritiesi
Belongs to the SepSecS family.Curated
Phylogenomic databases
eggNOGi | KOG3843, Eukaryota |
HOGENOMi | CLU_022508_0_0_1 |
InParanoidi | Q61JN8 |
OMAi | HIINGAY |
OrthoDBi | 680116at2759 |
Family and domain databases
Gene3Di | 3.40.640.10, 1 hit |
InterProi | View protein in InterPro IPR015424, PyrdxlP-dep_Trfase IPR015421, PyrdxlP-dep_Trfase_major IPR019872, Sec-tRNA_Se_transferase IPR008829, SepSecS/SepCysS |
PANTHERi | PTHR12944, PTHR12944, 1 hit |
Pfami | View protein in Pfam PF05889, SepSecS, 1 hit |
PIRSFi | PIRSF017689, SepSecS, 1 hit |
SUPFAMi | SSF53383, SSF53383, 1 hit |
TIGRFAMsi | TIGR03531, selenium_SpcS, 1 hit |
i Sequence
Sequence statusi: Complete.
Q61JN8-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MKSSFGKKEG EYSRLVSKSS NKLLNSLWEK KQIPEEGWTE HTLDLFLSWL
60 70 80 90 100
SSHDTNNRVD MIPVGAGERE GRVLTPLVQR LHSNLTHGIG RSGNLLEIQP
110 120 130 140 150
KALGSSMLAC LSNEFAKHAL HLLGLQTVKS CIVVPLCTGM SLSLCMTSWR
160 170 180 190 200
RRRPKAKYVI WLRIDQKSSL KSIYHAGFEA IIVEPTRDHD ALVTDVETVN
210 220 230 240 250
RIVEQRGEEL LCVMTTTSCF APRSPDNIEA ISAICAAHDV PHLVNNAYGL
260 270 280 290 300
QSEETIRKIA AAHECGRVDA VVQSLDKNFQ VPVGGALIAG FKQSHIQSIA
310 320 330 340 350
QAYPGRASSV PSRDLVLTFL YQGQSAFLEP FQKQKQMFLK MRRKLTSFAE
360 370 380 390 400
NVGECVYDVP ENEISLAMTL STIPPTKQTL FGSVLFSRGI TGARVVQSSQ
410 420 430 440 450
SKTTIEGCEF VNFGSHTAEQ HGGYLNIACS IGMADHELEE LFTRLTSSYA
460 470 480
KFIRQLAKED DRRGGSSGRR VPMNESFDME ND
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | HE600998 Genomic DNA Translation: CAP28918.3 |
RefSeqi | XP_002637191.1, XM_002637145.1 |
Genome annotation databases
EnsemblMetazoai | CBG09712.1; CBG09712.1; WBGene00031251 |
GeneIDi | 8579187 |
KEGGi | cbr:CBG09712 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | HE600998 Genomic DNA Translation: CAP28918.3 |
RefSeqi | XP_002637191.1, XM_002637145.1 |
3D structure databases
SMRi | Q61JN8 |
ModBasei | Search... |
Protein-protein interaction databases
STRINGi | 6238.CBG09712 |
Genome annotation databases
EnsemblMetazoai | CBG09712.1; CBG09712.1; WBGene00031251 |
GeneIDi | 8579187 |
KEGGi | cbr:CBG09712 |
Organism-specific databases
CTDi | 8579187 |
WormBasei | CBG09712 ; CBP02336 ; WBGene00031251 ; Cbr-secs-1 |
Phylogenomic databases
eggNOGi | KOG3843, Eukaryota |
HOGENOMi | CLU_022508_0_0_1 |
InParanoidi | Q61JN8 |
OMAi | HIINGAY |
OrthoDBi | 680116at2759 |
Enzyme and pathway databases
UniPathwayi | UPA00906;UER00898 |
Family and domain databases
Gene3Di | 3.40.640.10, 1 hit |
InterProi | View protein in InterPro IPR015424, PyrdxlP-dep_Trfase IPR015421, PyrdxlP-dep_Trfase_major IPR019872, Sec-tRNA_Se_transferase IPR008829, SepSecS/SepCysS |
PANTHERi | PTHR12944, PTHR12944, 1 hit |
Pfami | View protein in Pfam PF05889, SepSecS, 1 hit |
PIRSFi | PIRSF017689, SepSecS, 1 hit |
SUPFAMi | SSF53383, SSF53383, 1 hit |
TIGRFAMsi | TIGR03531, selenium_SpcS, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | SPCS_CAEBR | |
Accessioni | Q61JN8Primary (citable) accession number: Q61JN8 Secondary accession number(s): A8X8F7 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | March 29, 2005 |
Last sequence update: | November 23, 2004 | |
Last modified: | December 2, 2020 | |
This is version 84 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Caenorhabditis annotation project |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- PATHWAY comments
Index of metabolic and biosynthesis pathways - SIMILARITY comments
Index of protein domains and families