ID   SYA_PROM3               Reviewed;         892 AA.
AC   A2CDK7;
DT   02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 2.
DT   03-AUG-2022, entry version 82.
DE   RecName: Full=Alanine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_00036};
DE            EC=6.1.1.7 {ECO:0000255|HAMAP-Rule:MF_00036};
DE   AltName: Full=Alanyl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_00036};
DE            Short=AlaRS {ECO:0000255|HAMAP-Rule:MF_00036};
GN   Name=alaS {ECO:0000255|HAMAP-Rule:MF_00036}; OrderedLocusNames=P9303_28371;
OS   Prochlorococcus marinus (strain MIT 9303).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59922;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MIT 9303;
RX   PubMed=18159947; DOI=10.1371/journal.pgen.0030231;
RA   Kettler G.C., Martiny A.C., Huang K., Zucker J., Coleman M.L., Rodrigue S.,
RA   Chen F., Lapidus A., Ferriera S., Johnson J., Steglich C., Church G.M.,
RA   Richardson P., Chisholm S.W.;
RT   "Patterns and implications of gene gain and loss in the evolution of
RT   Prochlorococcus.";
RL   PLoS Genet. 3:2515-2528(2007).
CC   -!- FUNCTION: Catalyzes the attachment of alanine to tRNA(Ala) in a two-
CC       step reaction: alanine is first activated by ATP to form Ala-AMP and
CC       then transferred to the acceptor end of tRNA(Ala). Also edits
CC       incorrectly charged Ser-tRNA(Ala) and Gly-tRNA(Ala) via its editing
CC       domain. {ECO:0000255|HAMAP-Rule:MF_00036}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-alanine + tRNA(Ala) = AMP + diphosphate + L-alanyl-
CC         tRNA(Ala); Xref=Rhea:RHEA:12540, Rhea:RHEA-COMP:9657, Rhea:RHEA-
CC         COMP:9923, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:57972,
CC         ChEBI:CHEBI:78442, ChEBI:CHEBI:78497, ChEBI:CHEBI:456215; EC=6.1.1.7;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00036};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00036};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00036};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00036}.
CC   -!- DOMAIN: Consists of three domains; the N-terminal catalytic domain, the
CC       editing domain and the C-terminal C-Ala domain. The editing domain
CC       removes incorrectly charged amino acids, while the C-Ala domain, along
CC       with tRNA(Ala), serves as a bridge to cooperatively bring together the
CC       editing and aminoacylation centers thus stimulating deacylation of
CC       misacylated tRNAs. {ECO:0000255|HAMAP-Rule:MF_00036}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00036}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=ABM79567.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; CP000554; ABM79567.1; ALT_INIT; Genomic_DNA.
DR   AlphaFoldDB; A2CDK7; -.
DR   SMR; A2CDK7; -.
DR   STRING; 59922.P9303_28371; -.
DR   EnsemblBacteria; ABM79567; ABM79567; P9303_28371.
DR   KEGG; pmf:P9303_28371; -.
DR   HOGENOM; CLU_004485_1_1_3; -.
DR   BioCyc; PMAR59922:G1G80-2492-MON; -.
DR   Proteomes; UP000002274; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004813; F:alanine-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006419; P:alanyl-tRNA aminoacylation; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.30.930.10; -; 1.
DR   HAMAP; MF_00036_B; Ala_tRNA_synth_B; 1.
DR   InterPro; IPR045864; aa-tRNA-synth_II/BPL/LPL.
DR   InterPro; IPR002318; Ala-tRNA-lgiase_IIc.
DR   InterPro; IPR018162; Ala-tRNA-ligase_IIc_anticod-bd.
DR   InterPro; IPR018165; Ala-tRNA-synth_IIc_core.
DR   InterPro; IPR018164; Ala-tRNA-synth_IIc_N.
DR   InterPro; IPR023033; Ala_tRNA_ligase_euk/bac.
DR   InterPro; IPR003156; DHHA1_dom.
DR   InterPro; IPR018163; Thr/Ala-tRNA-synth_IIc_edit.
DR   InterPro; IPR009000; Transl_B-barrel_sf.
DR   InterPro; IPR012947; tRNA_SAD.
DR   Pfam; PF02272; DHHA1; 1.
DR   Pfam; PF01411; tRNA-synt_2c; 1.
DR   Pfam; PF07973; tRNA_SAD; 1.
DR   PRINTS; PR00980; TRNASYNTHALA.
DR   SMART; SM00863; tRNA_SAD; 1.
DR   SUPFAM; SSF101353; SSF101353; 1.
DR   SUPFAM; SSF50447; SSF50447; 1.
DR   SUPFAM; SSF55186; SSF55186; 1.
DR   SUPFAM; SSF55681; SSF55681; 1.
DR   TIGRFAMs; TIGR00344; alaS; 1.
DR   PROSITE; PS50860; AA_TRNA_LIGASE_II_ALA; 1.
PE   3: Inferred from homology;
KW   Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase; Metal-binding;
KW   Nucleotide-binding; Protein biosynthesis; RNA-binding; tRNA-binding; Zinc.
FT   CHAIN           1..892
FT                   /note="Alanine--tRNA ligase"
FT                   /id="PRO_0000347727"
FT   BINDING         574
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00036"
FT   BINDING         578
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00036"
FT   BINDING         676
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00036"
FT   BINDING         680
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00036"
SQ   SEQUENCE   892 AA;  96335 MW;  6629DF4864930E44 CRC64;
     MAVARSLRSG ESGPRTGSEI RTAFLTFFAE RAHQVIPSAS LVPEDPTVLL TIAGMLPFKP
     VFMGQAERPA PRATSSQKCI RTNDIENVGR TARHHTFFEM LGNFSFGDYF KQQAIEWAWE
     LSTEVFGLNP KNLVVSVFRE DDEAEAIWRD VVGVNPKRII RMDEADNFWA SGPTGPCGPC
     SEIYYDFKPD LGNDDIDLED DGRFVEFYNL VFMQYNRDGE GNLTPLANRN IDTGMGLERM
     AQILQGVPNN YETDIIYPLI ETAAGLAGLD YQKLDDKGKT SFKVIGDHCR AITHLICDGV
     TASNLGRGYI MRRLLRRVVR HGRLVGIEKP FLQAMGEAAI ALMVEAYPQL EERRKLILAE
     LNREEARFLE TLERGEKVLA DVLVANPQMI SGGQAFELYD TYGFPLELTQ EIAEEHGLTV
     DLQGFEQAMD QQRQRAKAAA VSIDLTLQGA IEQMAAELEA TRFKGYQVLE QPCCVLALVV
     NGESAERASA GDNVQIVLDT TPFYGESGGQ VGDHGVLSGE GSGGNGVIVA VDDVSRHRNV
     FVHFGRIERG TLALGDLVNA QVDRACRRRA QANHTATHLL QAALKQVVDS GIGQAGSLVD
     FDRLRFDFHC SRAVTAKELE QIEALINGWI MESHDLIVEE MSIQEAKAAG AVAMFGEKYA
     DVVRVVDVPG VSMELCGGTH VANTAEIGLF KIVAESSVAA GIRRIEAVAG PAVLAYLNER
     DVVVKELGDR FKAQPSEIIE RVISLQEELK SSQKALTAAR AELAVAKSAA LATQAVAVGE
     YQLLVARLDG VEGAGLQNAA QGLLDQLGDA TAVVLGGLPD PSDEGKVILV AAFGKQVIAQ
     GQQAGKFIGS IAKRCGGGGG GRPNLAQAGG RDGAALDGAL EAAKVELKQS LG