ID A0A0R3X3W6_HYDTA Unreviewed; 571 AA.
AC A0A0R3X3W6;
DT 20-JAN-2016, integrated into UniProtKB/TrEMBL.
DT 20-JAN-2016, sequence version 1.
DT 08-NOV-2023, entry version 33.
DE RecName: Full=O-phosphoseryl-tRNA(Sec) selenium transferase {ECO:0000256|ARBA:ARBA00021963, ECO:0000256|PIRNR:PIRNR017689};
DE EC=2.9.1.2 {ECO:0000256|ARBA:ARBA00012464, ECO:0000256|PIRNR:PIRNR017689};
DE AltName: Full=Selenocysteine synthase {ECO:0000256|ARBA:ARBA00030669, ECO:0000256|PIRNR:PIRNR017689};
DE AltName: Full=Selenocysteinyl-tRNA(Sec) synthase {ECO:0000256|ARBA:ARBA00032048, ECO:0000256|PIRNR:PIRNR017689};
DE AltName: Full=Sep-tRNA:Sec-tRNA synthase {ECO:0000256|ARBA:ARBA00032693, ECO:0000256|PIRNR:PIRNR017689};
GN ORFNames=TTAC_LOCUS8049 {ECO:0000313|EMBL:VDM32539.1};
OS Hydatigena taeniaeformis (Feline tapeworm) (Taenia taeniaeformis).
OC Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Platyhelminthes; Cestoda;
OC Eucestoda; Cyclophyllidea; Taeniidae; Hydatigera.
OX NCBI_TaxID=6205 {ECO:0000313|Proteomes:UP000046396, ECO:0000313|WBParaSite:TTAC_0000806401-mRNA-1};
RN [1] {ECO:0000313|WBParaSite:TTAC_0000806401-mRNA-1}
RP IDENTIFICATION.
RG WormBaseParasite;
RL Submitted (FEB-2017) to UniProtKB.
RN [2] {ECO:0000313|EMBL:VDM32539.1, ECO:0000313|Proteomes:UP000274429}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RG Pathogen Informatics;
RL Submitted (NOV-2018) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Converts O-phosphoseryl-tRNA(Sec) to selenocysteinyl-
CC tRNA(Sec) required for selenoprotein biosynthesis.
CC {ECO:0000256|ARBA:ARBA00002552, ECO:0000256|PIRNR:PIRNR017689}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + O-phospho-L-seryl-tRNA(Sec) + selenophosphate = L-
CC selenocysteinyl-tRNA(Sec) + 2 phosphate; Xref=Rhea:RHEA:25041,
CC Rhea:RHEA-COMP:9743, Rhea:RHEA-COMP:9947, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:16144, ChEBI:CHEBI:43474, ChEBI:CHEBI:78551,
CC ChEBI:CHEBI:78573; EC=2.9.1.2;
CC Evidence={ECO:0000256|ARBA:ARBA00001746,
CC ECO:0000256|PIRNR:PIRNR017689};
CC -!- COFACTOR:
CC Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC Evidence={ECO:0000256|ARBA:ARBA00001933,
CC ECO:0000256|PIRNR:PIRNR017689, ECO:0000256|PIRSR:PIRSR017689-50};
CC -!- PATHWAY: Aminoacyl-tRNA biosynthesis; selenocysteinyl-tRNA(Sec)
CC biosynthesis; selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec)
CC (archaeal/eukaryal route): step 2/2. {ECO:0000256|ARBA:ARBA00004822,
CC ECO:0000256|PIRNR:PIRNR017689}.
CC -!- SUBUNIT: Homotetramer formed by a catalytic dimer and a non-catalytic
CC dimer serving as a binding platform that orients tRNASec for catalysis.
CC Each tetramer binds the CCA ends of two tRNAs which point to the active
CC sites of the catalytic dimer. {ECO:0000256|ARBA:ARBA00026053}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|PIRNR:PIRNR017689}.
CC -!- SIMILARITY: Belongs to the SepSecS family.
CC {ECO:0000256|ARBA:ARBA00007037, ECO:0000256|PIRNR:PIRNR017689}.
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DR EMBL; UYWX01020437; VDM32539.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0R3X3W6; -.
DR STRING; 6205.A0A0R3X3W6; -.
DR WBParaSite; TTAC_0000806401-mRNA-1; TTAC_0000806401-mRNA-1; TTAC_0000806401.
DR UniPathway; UPA00906; UER00898.
DR Proteomes; UP000046396; Unplaced.
DR Proteomes; UP000274429; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0098621; F:O-phosphoseryl-tRNA(Sec) selenium transferase activity; IEA:UniProtKB-EC.
DR GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0001717; P:conversion of seryl-tRNAsec to selenocys-tRNAsec; IEA:UniProtKB-UniRule.
DR GO; GO:0006412; P:translation; IEA:UniProtKB-UniRule.
DR Gene3D; 3.40.640.10; Type I PLP-dependent aspartate aminotransferase-like (Major domain); 1.
DR InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR InterPro; IPR019872; Sec-tRNA_Se_transferase.
DR InterPro; IPR008829; SepSecS/SepCysS.
DR PANTHER; PTHR12944:SF2; O-PHOSPHOSERYL-TRNA(SEC) SELENIUM TRANSFERASE; 1.
DR PANTHER; PTHR12944; SOLUBLE LIVER ANTIGEN/LIVER PANCREAS ANTIGEN; 1.
DR Pfam; PF05889; SepSecS; 3.
DR PIRSF; PIRSF017689; SepSecS; 3.
DR SUPFAM; SSF53383; PLP-dependent transferases; 1.
PE 3: Inferred from homology;
KW Cytoplasm {ECO:0000256|PIRNR:PIRNR017689};
KW Protein biosynthesis {ECO:0000256|PIRNR:PIRNR017689};
KW Pyridoxal phosphate {ECO:0000256|PIRNR:PIRNR017689,
KW ECO:0000256|PIRSR:PIRSR017689-50};
KW Reference proteome {ECO:0000313|Proteomes:UP000274429};
KW RNA-binding {ECO:0000256|ARBA:ARBA00022884, ECO:0000256|PIRNR:PIRNR017689};
KW Selenium {ECO:0000256|PIRNR:PIRNR017689};
KW Transferase {ECO:0000256|PIRNR:PIRNR017689};
KW tRNA-binding {ECO:0000256|ARBA:ARBA00022555,
KW ECO:0000256|PIRNR:PIRNR017689}.
FT BINDING 80
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-1"
FT BINDING 102
FT /ligand="substrate"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-1"
FT BINDING 103
FT /ligand="substrate"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-1"
FT BINDING 110
FT /ligand="substrate"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-1"
FT BINDING 394
FT /ligand="substrate"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-1"
FT BINDING 558
FT /ligand="tRNA"
FT /ligand_id="ChEBI:CHEBI:17843"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-1"
FT SITE 79
FT /note="May act as a substrate filter by repelling compounds
FT with a negatively charged alpha-carboxylate"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-50"
FT MOD_RES 365
FT /note="N6-(pyridoxal phosphate)lysine"
FT /evidence="ECO:0000256|PIRSR:PIRSR017689-50"
SQ SEQUENCE 571 AA; 61833 MW; DC8D0B447A9FC04C CRC64;
MTANALEEEF YRNISQYIGG SGARRAVERL CGVESRFNNV MRTGCLPEEG FSEIEIEAII
SKLALMDSNN WYRSTGVGER EGRVLLNLVK RRHFSLAHGI GRSGDITAIQ PKASGSSLIN
RLSNSLLLDW LRRSGAPSTE ACLLVPMATG MTLTLCLLTL KRRRGPQAKY VIWPRIDQKS
CLKCIVAAGL IPIPIEPIQT VGRQKRVKKN KGVDFTKGVE ENGASVYADQ LSTNLEAIEL
AMFDPEGALR AGEGASVLPL KAKVSSLGPE SIVCVLSTTT CFAPRVPDRL PAITRLCKAQ
GIPHLVNNAY GVQSKRCMRL IESAWAEVHH PVAGKRADGE KRNVVDGNTN DSKPLDLLYV
QSTDKNLMVP VGGAIIAGFS KSLLQEIAES YPGRASGSPT LDVFATLLHL GRSGWESLLA
QREACYLRLT EGLRTLAAKH GLRLMDTPEN PISLALSLHA LHSGSNAVNL NPDTLTQIGA
NLFTQGCSGV RVVVPAAMER KSGLPAKVVA GVRLEGFNSH SAASAEAYMN AAAALGQTTV
EVDIFLSRLD KALSFFRRRQ QQRSLDQDSN K
//
