ID   SYM_HALWD               Reviewed;         741 AA.
AC   Q18JV4;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   25-JUL-2006, sequence version 1.
DT   03-AUG-2022, entry version 111.
DE   RecName: Full=Methionine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_00098};
DE            EC=6.1.1.10 {ECO:0000255|HAMAP-Rule:MF_00098};
DE   AltName: Full=Methionyl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_00098};
DE            Short=MetRS {ECO:0000255|HAMAP-Rule:MF_00098};
GN   Name=metG {ECO:0000255|HAMAP-Rule:MF_00098}; OrderedLocusNames=HQ_1572A;
OS   Haloquadratum walsbyi (strain DSM 16790 / HBSQ001).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Haloferacales;
OC   Haloferacaceae; Haloquadratum.
OX   NCBI_TaxID=362976;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 16790 / HBSQ001;
RX   PubMed=16820047; DOI=10.1186/1471-2164-7-169;
RA   Bolhuis H., Palm P., Wende A., Falb M., Rampp M., Rodriguez-Valera F.,
RA   Pfeiffer F., Oesterhelt D.;
RT   "The genome of the square archaeon Haloquadratum walsbyi: life at the
RT   limits of water activity.";
RL   BMC Genomics 7:169-169(2006).
CC   -!- FUNCTION: Is required not only for elongation of protein synthesis but
CC       also for the initiation of all mRNA translation through initiator
CC       tRNA(fMet) aminoacylation. {ECO:0000255|HAMAP-Rule:MF_00098}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-methionine + tRNA(Met) = AMP + diphosphate + L-
CC         methionyl-tRNA(Met); Xref=Rhea:RHEA:13481, Rhea:RHEA-COMP:9667,
CC         Rhea:RHEA-COMP:9698, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:57844, ChEBI:CHEBI:78442, ChEBI:CHEBI:78530,
CC         ChEBI:CHEBI:456215; EC=6.1.1.10; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00098};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00098};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00098};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00098}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00098}.
CC   -!- SIMILARITY: Belongs to the class-I aminoacyl-tRNA synthetase family.
CC       MetG type 1 subfamily. {ECO:0000255|HAMAP-Rule:MF_00098}.
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DR   EMBL; AM180088; CAJ51700.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q18JV4; -.
DR   SMR; Q18JV4; -.
DR   STRING; 362976.HQ_1572A; -.
DR   EnsemblBacteria; CAJ51700; CAJ51700; HQ_1572A.
DR   KEGG; hwa:HQ_1572A; -.
DR   eggNOG; arCOG00810; Archaea.
DR   HOGENOM; CLU_009710_1_2_2; -.
DR   OMA; SDMHGTP; -.
DR   Proteomes; UP000001975; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0004825; F:methionine-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0006431; P:methionyl-tRNA aminoacylation; IEA:UniProtKB-UniRule.
DR   CDD; cd07957; Anticodon_Ia_Met; 1.
DR   CDD; cd00814; MetRS_core; 1.
DR   CDD; cd02800; tRNA_bind_EcMetRS_like; 1.
DR   Gene3D; 2.20.28.20; -; 1.
DR   Gene3D; 2.40.50.140; -; 1.
DR   Gene3D; 3.40.50.620; -; 1.
DR   HAMAP; MF_00098; Met_tRNA_synth_type1; 1.
DR   InterPro; IPR001412; aa-tRNA-synth_I_CS.
DR   InterPro; IPR041872; Anticodon_Met.
DR   InterPro; IPR004495; Met-tRNA-synth_bsu_C.
DR   InterPro; IPR023458; Met-tRNA_ligase_1.
DR   InterPro; IPR014758; Met-tRNA_synth.
DR   InterPro; IPR015413; Methionyl/Leucyl_tRNA_Synth.
DR   InterPro; IPR033911; MetRS_core.
DR   InterPro; IPR029038; MetRS_Zn.
DR   InterPro; IPR012340; NA-bd_OB-fold.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   InterPro; IPR002547; tRNA-bd_dom.
DR   InterPro; IPR009080; tRNAsynth_Ia_anticodon-bd.
DR   PANTHER; PTHR45765; PTHR45765; 1.
DR   Pfam; PF19303; Anticodon_3; 1.
DR   Pfam; PF09334; tRNA-synt_1g; 2.
DR   Pfam; PF01588; tRNA_bind; 1.
DR   PRINTS; PR01041; TRNASYNTHMET.
DR   SUPFAM; SSF47323; SSF47323; 1.
DR   SUPFAM; SSF50249; SSF50249; 1.
DR   SUPFAM; SSF57770; SSF57770; 1.
DR   TIGRFAMs; TIGR00398; metG; 1.
DR   PROSITE; PS00178; AA_TRNA_LIGASE_I; 1.
DR   PROSITE; PS50886; TRBD; 1.
PE   3: Inferred from homology;
KW   Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase; Metal-binding;
KW   Nucleotide-binding; Protein biosynthesis; Reference proteome; RNA-binding;
KW   tRNA-binding; Zinc.
FT   CHAIN           1..741
FT                   /note="Methionine--tRNA ligase"
FT                   /id="PRO_0000331936"
FT   DOMAIN          643..741
FT                   /note="tRNA-binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00098"
FT   REGION          1..27
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          309..329
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          591..629
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOTIF           36..46
FT                   /note="'HIGH' region"
FT   COMPBIAS        1..25
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        612..629
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         167
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00098"
FT   BINDING         170
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00098"
FT   BINDING         179
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00098"
FT   BINDING         183
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00098"
FT   BINDING         381
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00098"
SQ   SEQUENCE   741 AA;  82611 MW;  555BC89E43CB10E8 CRC64;
     MTMKQYTMSK MNAETQTQTR ESFPTDDPAV VTCGLPYANG DLHIGHLRTY VGGDIFSRAL
     KRLGQETAFV SGSDMHGTPV AVNAAEEGVT PESFALRHHE QYETTFPQFG IEFDNYGHTH
     DETNVEMTRE IVEALIQAGY VYEREIPVAY DPAADQWLPD RFVNGTCPYC GAHARGDECD
     EGCGRHLEPG EIETPVSTIT GNDAEYRRRE HQFFAVSELQ SYLSSFLDRL EGTTNAQNQP
     REWVEGELQD WCITRDMDWG VDYPDDNDLV LYVWVDAPIE YISSTKQYAE RVGTDSFDWK
     NAWRDIPGVR SHSSSSAKDS SEGNSPSNIN NGGEIIHIIG RDIIQHHTVF WPAMLHAAGY
     TEPRAVMASG FITLEGKGFS TSRNRAVWAD EYLAEGFHPD LLRYYLATNG GFQQDVDFSW
     SRFRERVNNE LVGTVGNFIY RSLLFAAREF DGTPDVALSD SVEERIETAI DAFTAGVNEY
     SVRAVGDAAV KLAQFGNEYI QHHEPWKLSN DDPQKQQVMR DCIQLAKAIA VLFEPVTPAA
     AERVWADLGE SGDIHTVGIE SALVAPPQTF DEPTELFEKI PEERVDELTA KLADRVTDPT
     DDDDSDTDTE TGTDVAETTN ESHSESNMTE IDPIADERID FEEFEELDLR VAEIIETEPI
     EDADKLARIV VDLGIEQRQL VAGIRQLHDL DDLIGETVVI VANLEKAEIF GVESNGMLLA
     AGADADLLTT REDADPGTSI Q