ID   SYFA_SACS2              Reviewed;         468 AA.
AC   P95961;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 2.
DT   04-NOV-2026, entry version 149.
DE   RecName: Full=Phenylalanine--tRNA ligase alpha subunit {ECO:0000255|HAMAP-Rule:MF_00282};
DE            EC=6.1.1.20 {ECO:0000255|HAMAP-Rule:MF_00282};
DE   AltName: Full=Phenylalanyl-tRNA synthetase alpha subunit {ECO:0000255|HAMAP-Rule:MF_00282};
DE            Short=PheRS {ECO:0000255|HAMAP-Rule:MF_00282};
GN   Name=pheS {ECO:0000255|HAMAP-Rule:MF_00282};
GN   OrderedLocusNames=SSO0100; ORFNames=C04_022;
OS   Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)
OS   (Sulfolobus solfataricus).
OC   Archaea; Thermoproteota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Saccharolobus.
OX   NCBI_TaxID=273057;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 35092 / DSM 1617 / JCM 11322 / P2;
RX   PubMed=8899719; DOI=10.1111/j.1365-2958.1996.tb02666.x;
RA   Sensen C.W., Klenk H.-P., Singh R.K., Allard G., Chan C.C.-Y., Liu Q.Y.,
RA   Penny S.L., Young F., Schenk M.E., Gaasterland T., Doolittle W.F.,
RA   Ragan M.A., Charlebois R.L.;
RT   "Organizational characteristics and information content of an archaeal
RT   genome: 156 kb of sequence from Sulfolobus solfataricus P2.";
RL   Mol. Microbiol. 22:175-191(1996).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 35092 / DSM 1617 / JCM 11322 / P2;
RX   PubMed=11427726; DOI=10.1073/pnas.141222098;
RA   She Q., Singh R.K., Confalonieri F., Zivanovic Y., Allard G., Awayez M.J.,
RA   Chan-Weiher C.C.-Y., Clausen I.G., Curtis B.A., De Moors A., Erauso G.,
RA   Fletcher C., Gordon P.M.K., Heikamp-de Jong I., Jeffries A.C., Kozera C.J.,
RA   Medina N., Peng X., Thi-Ngoc H.P., Redder P., Schenk M.E., Theriault C.,
RA   Tolstrup N., Charlebois R.L., Doolittle W.F., Duguet M., Gaasterland T.,
RA   Garrett R.A., Ragan M.A., Sensen C.W., Van der Oost J.;
RT   "The complete genome of the crenarchaeon Sulfolobus solfataricus P2.";
RL   Proc. Natl. Acad. Sci. U.S.A. 98:7835-7840(2001).
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_00282};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00282};
CC       Note=Binds 2 magnesium ions per tetramer. {ECO:0000255|HAMAP-
CC       Rule:MF_00282};
CC   -!- SUBUNIT: Tetramer of two alpha and two beta subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_00282}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00282}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       Phe-tRNA synthetase alpha subunit type 2 subfamily. {ECO:0000255|HAMAP-
CC       Rule:MF_00282}.
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DR   EMBL; Y08257; CAA69551.1; -; Genomic_DNA.
DR   EMBL; AE006641; AAK40456.1; -; Genomic_DNA.
DR   PIR; S75389; S75389.
DR   AlphaFoldDB; P95961; -.
DR   SMR; P95961; -.
DR   FunCoup; P95961; 341.
DR   STRING; 273057.SSO0100; -.
DR   PaxDb; 273057-SSO0100; -.
DR   EnsemblBacteria; AAK40456; AAK40456; SSO0100.
DR   KEGG; sso:SSO0100; -.
DR   PATRIC; fig|273057.12.peg.97; -.
DR   eggNOG; arCOG00410; Archaea.
DR   HOGENOM; CLU_025086_2_2_2; -.
DR   InParanoid; P95961; -.
DR   OMA; AAMKNKW; -.
DR   PhylomeDB; P95961; -.
DR   Proteomes; UP000001974; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IBA:GO_Central.
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; IBA:GO_Central.
DR   GO; GO:0000049; F:tRNA binding; IEA:InterPro.
DR   GO; GO:0006432; P:phenylalanyl-tRNA aminoacylation; IBA:GO_Central.
DR   CDD; cd00496; PheRS_alpha_core; 1.
DR   Gene3D; 3.30.930.10; Bira Bifunctional Protein, Domain 2; 1.
DR   Gene3D; 1.10.10.10; Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain; 1.
DR   HAMAP; MF_00282; Phe_tRNA_synth_alpha2; 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; IPR022917; Phe_tRNA_ligase_alpha_bac/arc.
DR   InterPro; IPR002319; Phenylalanyl-tRNA_Synthase.
DR   InterPro; IPR036388; WH-like_DNA-bd_sf.
DR   InterPro; IPR036390; WH_DNA-bd_sf.
DR   NCBIfam; NF003210; pheS; 1.
DR   NCBIfam; TIGR00468; pheS; 1.
DR   PANTHER; PTHR11538:SF40; PHENYLALANINE--TRNA LIGASE ALPHA SUBUNIT; 1.
DR   PANTHER; PTHR11538; PHENYLALANYL-TRNA SYNTHETASE; 1.
DR   Pfam; PF01409; tRNA-synt_2d; 1.
DR   SUPFAM; SSF55681; Class II aaRS and biotin synthetases; 1.
DR   SUPFAM; SSF46785; Winged helix' DNA-binding domain; 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..468
FT                   /note="Phenylalanine--tRNA ligase alpha subunit"
FT                   /id="PRO_0000126820"
FT   BINDING         311
FT                   /ligand="L-phenylalanine"
FT                   /ligand_id="ChEBI:CHEBI:58095"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00282"
FT   BINDING         350..352
FT                   /ligand="L-phenylalanine"
FT                   /ligand_id="ChEBI:CHEBI:58095"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00282"
FT   BINDING         390
FT                   /ligand="L-phenylalanine"
FT                   /ligand_id="ChEBI:CHEBI:58095"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00282"
FT   BINDING         392
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="shared with beta subunit"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00282"
SQ   SEQUENCE   468 AA;  54102 MW;  527E274CC79944E2 CRC64;
     MISMLSENEA KILFFLKDLK KTNSVELAIK MGIPESSVLS LIELLREKGY VKTEVKSEKH
     YVLTEEGRKR KESGLPEDIL INTLNGQEKD LNEIKNILNK DFNIAISWAK RKGLIDIKEG
     KVIPKVKTYM SSEYLALSNL ERADSNTINL LKKRGLIEEK ERKIVSVELI KEPKESEIGI
     SNLNRELIIS GEWKKYKLKK YNVEAFPPYY TISKKHYFRE FLEKVKDIMI SLGFKEINTG
     YIEMEFYNFD LLFQPQDHPA REIHDSFSVE GSGKIEDKDL LNNVKEIHEK FWKYEWKQDI
     TLRLMLRSQT TATTARVLAS RPKAPQKVFT LGKVFRPDAI DATHLIEFHQ LDGVIIDNNF
     TFKELLGVLK EIFYRLGIKE VKFKPAYFPF TEPSVEAYGY LEKLGWVEMC GAGLLRPEIL
     SSVGIDSTAG AWGIGIERLA MSFLNISDIR LLYSNNIEYI RDTKVKIE
//