ID SYS_MYCGE Reviewed; 417 AA. AC P47251; DT 01-FEB-1996, integrated into UniProtKB/Swiss-Prot. DT 01-FEB-1996, sequence version 1. DT 10-JUN-2026, entry version 137. DE RecName: Full=Serine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_00176}; DE EC=6.1.1.11 {ECO:0000255|HAMAP-Rule:MF_00176}; DE AltName: Full=Seryl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_00176}; DE Short=SerRS {ECO:0000255|HAMAP-Rule:MF_00176}; DE AltName: Full=Seryl-tRNA(Ser/Sec) synthetase {ECO:0000255|HAMAP-Rule:MF_00176}; GN Name=serS {ECO:0000255|HAMAP-Rule:MF_00176}; OrderedLocusNames=MG005; OS Mycoplasmoides genitalium (strain ATCC 33530 / DSM 19775 / NCTC 10195 / OS G37) (Mycoplasma genitalium). OC Bacteria; Bacillati; Mycoplasmatota; Mycoplasmoidales; Mycoplasmoidaceae; OC Mycoplasmoides. OX NCBI_TaxID=243273; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC 33530 / DSM 19775 / NCTC 10195 / G37; RX PubMed=7569993; DOI=10.1126/science.270.5235.397; RA Fraser C.M., Gocayne J.D., White O., Adams M.D., Clayton R.A., RA Fleischmann R.D., Bult C.J., Kerlavage A.R., Sutton G.G., Kelley J.M., RA Fritchman J.L., Weidman J.F., Small K.V., Sandusky M., Fuhrmann J.L., RA Nguyen D.T., Utterback T.R., Saudek D.M., Phillips C.A., Merrick J.M., RA Tomb J.-F., Dougherty B.A., Bott K.F., Hu P.-C., Lucier T.S., RA Peterson S.N., Smith H.O., Hutchison C.A. III, Venter J.C.; RT "The minimal gene complement of Mycoplasma genitalium."; RL Science 270:397-403(1995). RN [2] RP NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-125. RC STRAIN=ATCC 33530 / DSM 19775 / NCTC 10195 / G37; RX PubMed=8083173; DOI=10.1128/jb.176.18.5814-5819.1994; RA Bailey C.C., Bott K.F.; RT "An unusual gene containing a dnaJ N-terminal box flanks the putative RT origin of replication of Mycoplasma genitalium."; RL J. Bacteriol. 176:5814-5819(1994). RN [3] RP NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 6-112. RC STRAIN=ATCC 33530 / DSM 19775 / NCTC 10195 / G37; RX PubMed=8253680; DOI=10.1128/jb.175.24.7918-7930.1993; RA Peterson S.N., Hu P.-C., Bott K.F., Hutchison C.A. III; RT "A survey of the Mycoplasma genitalium genome by using random sequencing."; RL J. Bacteriol. 175:7918-7930(1993). CC -!- FUNCTION: Catalyzes the attachment of serine to tRNA(Ser). Is also able CC to aminoacylate tRNA(Sec) with serine, to form the misacylated tRNA L- CC seryl-tRNA(Sec), which will be further converted into selenocysteinyl- CC tRNA(Sec). {ECO:0000255|HAMAP-Rule:MF_00176}. CC -!- CATALYTIC ACTIVITY: CC Reaction=tRNA(Ser) + L-serine + ATP = L-seryl-tRNA(Ser) + AMP + CC diphosphate + H(+); Xref=Rhea:RHEA:12292, Rhea:RHEA-COMP:9669, CC Rhea:RHEA-COMP:9703, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, CC ChEBI:CHEBI:33019, ChEBI:CHEBI:33384, ChEBI:CHEBI:78442, CC ChEBI:CHEBI:78533, ChEBI:CHEBI:456215; EC=6.1.1.11; CC Evidence={ECO:0000255|HAMAP-Rule:MF_00176}; CC -!- CATALYTIC ACTIVITY: CC Reaction=tRNA(Sec) + L-serine + ATP = L-seryl-tRNA(Sec) + AMP + CC diphosphate + H(+); Xref=Rhea:RHEA:42580, Rhea:RHEA-COMP:9742, CC Rhea:RHEA-COMP:10128, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, CC ChEBI:CHEBI:33019, ChEBI:CHEBI:33384, ChEBI:CHEBI:78442, CC ChEBI:CHEBI:78533, ChEBI:CHEBI:456215; EC=6.1.1.11; CC Evidence={ECO:0000255|HAMAP-Rule:MF_00176}; CC -!- PATHWAY: Aminoacyl-tRNA biosynthesis; selenocysteinyl-tRNA(Sec) CC biosynthesis; L-seryl-tRNA(Sec) from L-serine and tRNA(Sec): step 1/1. CC {ECO:0000255|HAMAP-Rule:MF_00176}. CC -!- SUBUNIT: Homodimer. The tRNA molecule binds across the dimer. CC {ECO:0000255|HAMAP-Rule:MF_00176}. CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00176}. CC -!- DOMAIN: Consists of two distinct domains, a catalytic core and a N- CC terminal extension that is involved in tRNA binding. CC {ECO:0000255|HAMAP-Rule:MF_00176}. CC -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family. CC Type-1 seryl-tRNA synthetase subfamily. {ECO:0000255|HAMAP- CC Rule:MF_00176}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; L43967; AAC71221.1; -; Genomic_DNA. DR EMBL; U09251; AAA57073.1; -; Genomic_DNA. DR EMBL; U02210; AAD12502.1; -; Genomic_DNA. DR PIR; E64200; E64200. DR RefSeq; WP_010869286.1; NC_000908.2. DR AlphaFoldDB; P47251; -. DR SMR; P47251; -. DR FunCoup; P47251; 198. DR STRING; 243273.MG_005; -. DR GeneID; 99646813; -. DR KEGG; mge:MG_005; -. DR eggNOG; COG0172; Bacteria. DR HOGENOM; CLU_023797_1_1_14; -. DR InParanoid; P47251; -. DR OrthoDB; 9804647at2; -. DR BioCyc; MGEN243273:G1GJ2-5-MONOMER; -. DR UniPathway; UPA00906; UER00895. DR Proteomes; UP000000807; Chromosome. DR GO; GO:0005829; C:cytosol; IBA:GO_Central. DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule. DR GO; GO:0004828; F:serine-tRNA ligase activity; IBA:GO_Central. DR GO; GO:0016260; P:L-selenocysteine biosynthetic process; IEA:UniProtKB-UniRule. DR GO; GO:0006434; P:seryl-tRNA aminoacylation; IBA:GO_Central. DR CDD; cd00770; SerRS_core; 1. DR Gene3D; 3.30.930.10; Bira Bifunctional Protein, Domain 2; 1. DR Gene3D; 1.10.287.40; Serine-tRNA synthetase, tRNA binding domain; 1. DR HAMAP; MF_00176; Ser_tRNA_synth_type1; 1. DR InterPro; IPR002314; aa-tRNA-synt_IIb. DR InterPro; IPR006195; aa-tRNA-synth_II. DR InterPro; IPR045864; aa-tRNA-synth_II/BPL/LPL. DR InterPro; IPR002317; Ser-tRNA-ligase_type_1. DR InterPro; IPR015866; Ser-tRNA-synth_1_N. DR InterPro; IPR042103; SerRS_1_N_sf. DR InterPro; IPR033729; SerRS_core. DR InterPro; IPR010978; tRNA-bd_arm. DR NCBIfam; TIGR00414; serS; 1. DR PANTHER; PTHR43697:SF1; SERINE--TRNA LIGASE; 1. DR PANTHER; PTHR43697; SERYL-TRNA SYNTHETASE; 1. DR Pfam; PF02403; Seryl_tRNA_N; 1. DR Pfam; PF00587; tRNA-synt_2b; 1. DR PIRSF; PIRSF001529; Ser-tRNA-synth_IIa; 1. DR PRINTS; PR00981; TRNASYNTHSER. DR SUPFAM; SSF55681; Class II aaRS and biotin synthetases; 1. DR SUPFAM; SSF46589; tRNA-binding arm; 1. DR PROSITE; PS50862; AA_TRNA_LIGASE_II; 1. PE 3: Inferred from homology; KW Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase; KW Nucleotide-binding; Protein biosynthesis; Reference proteome. FT CHAIN 1..417 FT /note="Serine--tRNA ligase" FT /id="PRO_0000122079" FT BINDING 225..227 FT /ligand="L-serine" FT /ligand_id="ChEBI:CHEBI:33384" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00176" FT BINDING 256..258 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00176" FT BINDING 279 FT /ligand="L-serine" FT /ligand_id="ChEBI:CHEBI:33384" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00176" FT BINDING 343..346 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00176" FT BINDING 379 FT /ligand="L-serine" FT /ligand_id="ChEBI:CHEBI:33384" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00176" SQ SEQUENCE 417 AA; 47987 MW; 5E43280A5915DDD0 CRC64; MLDPNKLRNN YDFFKKKLLE RNVNEQLLNQ FIQTDKLMRK NLQQLELANQ KQSLLAKQVA KQKDNKKLLA ESKELKQKIE NLNNAYKDSQ NISQDLLLNF PNIAHESVPV GKNESANLEL LKEGRKPVFD FKPLPHRELC EKLNLVAFDK ATKISGTRFV AYTDKAAKLL RAITNLMIDL NKSKYQEWNL PVVINELSLR STGQLPKFKD DVFKLENTRY YLSPTLEVQL INLHANEIFN EEDLPKYYTA TGINFRQEAG SAGKQTKGTI RLHQFQKTEL VKFCKPENAI NELEAMVRDA EQILKALKLP FRRLLLCTGD MGFSAEKTYD LEVWMAASNE YREVSSCSSC GDFQARRAMI RYKDINNGKN SYVATLNGTA LSIDRIFAAI LENFQTKDGK ILIPQALKKY LDFDTIK //