ID   SYFA_BACFN              Reviewed;         339 AA.
AC   Q5LAS4;
DT   04-APR-2006, integrated into UniProtKB/Swiss-Prot.
DT   21-JUN-2005, sequence version 1.
DT   10-JUN-2026, entry version 111.
DE   RecName: Full=Phenylalanine--tRNA ligase alpha subunit {ECO:0000255|HAMAP-Rule:MF_00281};
DE            EC=6.1.1.20 {ECO:0000255|HAMAP-Rule:MF_00281};
DE   AltName: Full=Phenylalanyl-tRNA synthetase alpha subunit {ECO:0000255|HAMAP-Rule:MF_00281};
DE            Short=PheRS {ECO:0000255|HAMAP-Rule:MF_00281};
GN   Name=pheS {ECO:0000255|HAMAP-Rule:MF_00281}; OrderedLocusNames=BF3104;
OS   Bacteroides fragilis (strain ATCC 25285 / DSM 2151 / CCUG 4856 / JCM 11019
OS   / LMG 10263 / NCTC 9343 / Onslow / VPI 2553 / EN-2).
OC   Bacteria; Pseudomonadati; Bacteroidota; Bacteroidia; Bacteroidales;
OC   Bacteroidaceae; Bacteroides.
OX   NCBI_TaxID=272559;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 25285 / DSM 2151 / CCUG 4856 / JCM 11019 / LMG 10263 /
RC   NCTC 9343 / Onslow / VPI 2553 / EN-2;
RX   PubMed=15746427; DOI=10.1126/science.1107008;
RA   Cerdeno-Tarraga A.-M., Patrick S., Crossman L.C., Blakely G., Abratt V.,
RA   Lennard N., Poxton I., Duerden B., Harris B., Quail M.A., Barron A.,
RA   Clark L., Corton C., Doggett J., Holden M.T.G., Larke N., Line A., Lord A.,
RA   Norbertczak H., Ormond D., Price C., Rabbinowitsch E., Woodward J.,
RA   Barrell B.G., Parkhill J.;
RT   "Extensive DNA inversions in the B. fragilis genome control variable gene
RT   expression.";
RL   Science 307:1463-1465(2005).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=tRNA(Phe) + L-phenylalanine + ATP = L-phenylalanyl-tRNA(Phe) +
CC         AMP + diphosphate + H(+); Xref=Rhea:RHEA:19413, Rhea:RHEA-COMP:9668,
CC         Rhea:RHEA-COMP:9699, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:58095, ChEBI:CHEBI:78442,
CC         ChEBI:CHEBI:78531, ChEBI:CHEBI:456215; EC=6.1.1.20;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00281};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00281};
CC       Note=Binds 2 magnesium ions per tetramer. {ECO:0000255|HAMAP-
CC       Rule:MF_00281};
CC   -!- SUBUNIT: Tetramer of two alpha and two beta subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_00281}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00281}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       Phe-tRNA synthetase alpha subunit type 1 subfamily. {ECO:0000255|HAMAP-
CC       Rule:MF_00281}.
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DR   EMBL; CR626927; CAH08799.1; -; Genomic_DNA.
DR   RefSeq; WP_005789293.1; NC_003228.3.
DR   AlphaFoldDB; Q5LAS4; -.
DR   SMR; Q5LAS4; -.
DR   GeneID; 60367745; -.
DR   KEGG; bfs:BF9343_3018; -.
DR   eggNOG; COG0016; Bacteria.
DR   HOGENOM; CLU_025086_0_1_10; -.
DR   Proteomes; UP000006731; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004826; F:phenylalanine-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000049; F:tRNA binding; IEA:InterPro.
DR   GO; GO:0006432; P:phenylalanyl-tRNA aminoacylation; IEA:UniProtKB-UniRule.
DR   CDD; cd00496; PheRS_alpha_core; 1.
DR   FunFam; 3.30.930.10:FF:000003; Phenylalanine--tRNA ligase alpha subunit; 1.
DR   Gene3D; 3.30.930.10; Bira Bifunctional Protein, Domain 2; 1.
DR   HAMAP; MF_00281; Phe_tRNA_synth_alpha1; 1.
DR   InterPro; IPR006195; aa-tRNA-synth_II.
DR   InterPro; IPR045864; aa-tRNA-synth_II/BPL/LPL.
DR   InterPro; IPR004529; Phe-tRNA-synth_IIc_asu.
DR   InterPro; IPR004188; Phe-tRNA_ligase_II_N.
DR   InterPro; IPR022911; Phe_tRNA_ligase_alpha1_bac.
DR   InterPro; IPR002319; Phenylalanyl-tRNA_Synthase.
DR   InterPro; IPR010978; tRNA-bd_arm.
DR   NCBIfam; TIGR00468; pheS; 1.
DR   PANTHER; PTHR11538:SF41; PHENYLALANINE--TRNA LIGASE, MITOCHONDRIAL; 1.
DR   PANTHER; PTHR11538; PHENYLALANYL-TRNA SYNTHETASE; 1.
DR   Pfam; PF02912; Phe_tRNA-synt_N; 1.
DR   Pfam; PF01409; tRNA-synt_2d; 1.
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; Magnesium;
KW   Metal-binding; Nucleotide-binding; Protein biosynthesis;
KW   Reference proteome.
FT   CHAIN           1..339
FT                   /note="Phenylalanine--tRNA ligase alpha subunit"
FT                   /id="PRO_0000231963"
FT   BINDING         250
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="shared with beta subunit"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00281"
SQ   SEQUENCE   339 AA;  38501 MW;  6A8CFE6AEBA2F16A CRC64;
     MIAKINQLLE EVGALKAANA EELEVLRIKY LSKKGAINDL MADFRNVAAE QKKEVGMKLN
     ELKTKAQEKI NALKEQFDNQ DNGQDDLDLT RSAYPVELGT RHPLSIVRNE IIDIFARLGF
     NIAEGPEIED DWHVFSALNF AEDHPARDMQ DTFFIESHPD VLLRTHTSSV QSRVMEVSQP
     PIRIICPGRV YRNEAISYRA HCFFHQVEAL YVDRNVSFTD LKQVLLLFAK EMFGADTKIR
     LRPSYFPFTE PSAEMDISCN ICGGKGCPFC KHTGWVEILG CGMVDPNVLD ANGIDSKVYS
     GYALGMGIER ITNLKYQVKD LRMFSENDTR FLKEFEAAY
//