ID   SYFA_CHLMU              Reviewed;         341 AA.
AC   Q9PL83;
DT   08-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2000, sequence version 1.
DT   28-JAN-2026, entry version 138.
DE   RecName: Full=Phenylalanine--tRNA ligase alpha subunit;
DE            EC=6.1.1.20;
DE   AltName: Full=Phenylalanyl-tRNA synthetase alpha subunit;
DE            Short=PheRS;
GN   Name=pheS; OrderedLocusNames=TC_0224;
OS   Chlamydia muridarum (strain MoPn / Nigg).
OC   Bacteria; Pseudomonadati; Chlamydiota; Chlamydiia; Chlamydiales;
OC   Chlamydiaceae; Chlamydia/Chlamydophila group; Chlamydia.
OX   NCBI_TaxID=243161;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MoPn / Nigg;
RX   PubMed=10684935; DOI=10.1093/nar/28.6.1397;
RA   Read T.D., Brunham R.C., Shen C., Gill S.R., Heidelberg J.F., White O.,
RA   Hickey E.K., Peterson J.D., Utterback T.R., Berry K.J., Bass S.,
RA   Linher K.D., Weidman J.F., Khouri H.M., Craven B., Bowman C., Dodson R.J.,
RA   Gwinn M.L., Nelson W.C., DeBoy R.T., Kolonay J.F., McClarty G.,
RA   Salzberg S.L., Eisen J.A., Fraser C.M.;
RT   "Genome sequences of Chlamydia trachomatis MoPn and Chlamydia pneumoniae
RT   AR39.";
RL   Nucleic Acids Res. 28:1397-1406(2000).
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   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC       Note=Binds 2 magnesium ions per tetramer. {ECO:0000250};
CC   -!- SUBUNIT: Tetramer of two alpha and two beta subunits. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       Phe-tRNA synthetase alpha subunit type 1 subfamily. {ECO:0000305}.
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DR   EMBL; AE002160; AAF39096.1; -; Genomic_DNA.
DR   PIR; F81727; F81727.
DR   RefSeq; WP_010229860.1; NC_002620.2.
DR   AlphaFoldDB; Q9PL83; -.
DR   SMR; Q9PL83; -.
DR   GeneID; 1246392; -.
DR   KEGG; cmu:TC_0224; -.
DR   eggNOG; COG0016; Bacteria.
DR   HOGENOM; CLU_025086_0_1_0; -.
DR   OrthoDB; 9800719at2; -.
DR   Proteomes; UP000000800; 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   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..341
FT                   /note="Phenylalanine--tRNA ligase alpha subunit"
FT                   /id="PRO_0000126686"
FT   BINDING         256
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="shared with beta subunit"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   341 AA;  38781 MW;  62426ADD147EFB89 CRC64;
     MTIQEELEAV KQQFSCDLSL VHSSKDLFDL KVKYLGKKGI FRGFADQLRE CPVEQKATIG
     ASINACKQYI EEVLLEKSQV ILAKEEAEEF LKEKVDVSLP GEDAPLGGKH IIKKVLDDVV
     DIFVRFGFCV REAPNIESEK NNFSLLNFEE DHPARQMQDT FYLDPVTVLR THTSNVQSRE
     LARNKPPVRV VAPGECFRNE DISARSHVTF HQVEAFHVDR DVSFSDLTSM LSGFYHIFFG
     RKVELRYRHS YFPFVEPGIE VDISCECRGA GCSLCKHSGW LEVAGAGMIH PNVLRQANID
     PEEYSGYALG MGIERLAMLK YGISDIRLFS ENDLRFLRQF S
//