ID   SYDN2_SYNAS             Reviewed;         591 AA.
AC   Q2LTE0;
DT   16-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT   21-FEB-2006, sequence version 1.
DT   03-AUG-2022, entry version 101.
DE   RecName: Full=Aspartate--tRNA(Asp/Asn) ligase 2 {ECO:0000255|HAMAP-Rule:MF_00044};
DE            EC=6.1.1.23 {ECO:0000255|HAMAP-Rule:MF_00044};
DE   AltName: Full=Aspartyl-tRNA synthetase 2 {ECO:0000255|HAMAP-Rule:MF_00044};
DE            Short=AspRS 2 {ECO:0000255|HAMAP-Rule:MF_00044};
DE   AltName: Full=Non-discriminating aspartyl-tRNA synthetase 2 {ECO:0000255|HAMAP-Rule:MF_00044};
DE            Short=ND-AspRS 2 {ECO:0000255|HAMAP-Rule:MF_00044};
GN   Name=aspS2 {ECO:0000255|HAMAP-Rule:MF_00044};
GN   OrderedLocusNames=SYNAS_14750; ORFNames=SYN_02535;
OS   Syntrophus aciditrophicus (strain SB).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Syntrophales; Syntrophaceae;
OC   Syntrophus.
OX   NCBI_TaxID=56780;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SB;
RX   PubMed=17442750; DOI=10.1073/pnas.0610456104;
RA   McInerney M.J., Rohlin L., Mouttaki H., Kim U., Krupp R.S.,
RA   Rios-Hernandez L., Sieber J., Struchtemeyer C.G., Bhattacharyya A.,
RA   Campbell J.W., Gunsalus R.P.;
RT   "The genome of Syntrophus aciditrophicus: life at the thermodynamic limit
RT   of microbial growth.";
RL   Proc. Natl. Acad. Sci. U.S.A. 104:7600-7605(2007).
CC   -!- FUNCTION: Aspartyl-tRNA synthetase with relaxed tRNA specificity since
CC       it is able to aspartylate not only its cognate tRNA(Asp) but also
CC       tRNA(Asn). Reaction proceeds in two steps: L-aspartate is first
CC       activated by ATP to form Asp-AMP and then transferred to the acceptor
CC       end of tRNA(Asp/Asn). {ECO:0000255|HAMAP-Rule:MF_00044}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-aspartate + tRNA(Asx) = AMP + diphosphate + L-
CC         aspartyl-tRNA(Asx); Xref=Rhea:RHEA:18349, Rhea:RHEA-COMP:9710,
CC         Rhea:RHEA-COMP:9711, ChEBI:CHEBI:29991, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:78442, ChEBI:CHEBI:78516,
CC         ChEBI:CHEBI:456215; EC=6.1.1.23; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00044};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00044}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00044}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       Type 1 subfamily. {ECO:0000255|HAMAP-Rule:MF_00044}.
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DR   EMBL; CP000252; ABC77354.1; -; Genomic_DNA.
DR   RefSeq; WP_011417376.1; NC_007759.1.
DR   AlphaFoldDB; Q2LTE0; -.
DR   SMR; Q2LTE0; -.
DR   STRING; 56780.SYN_02535; -.
DR   EnsemblBacteria; ABC77354; ABC77354; SYN_02535.
DR   KEGG; sat:SYN_02535; -.
DR   eggNOG; COG0173; Bacteria.
DR   HOGENOM; CLU_014330_3_2_7; -.
DR   OMA; YQLDVEM; -.
DR   OrthoDB; 226836at2; -.
DR   Proteomes; UP000001933; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004815; F:aspartate-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0050560; F:aspartate-tRNA(Asn) ligase activity; IEA:UniProtKB-EC.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003676; F:nucleic acid binding; IEA:InterPro.
DR   GO; GO:0006422; P:aspartyl-tRNA aminoacylation; IEA:UniProtKB-UniRule.
DR   Gene3D; 2.40.50.140; -; 1.
DR   Gene3D; 3.30.1360.30; -; 1.
DR   Gene3D; 3.30.930.10; -; 1.
DR   HAMAP; MF_00044; Asp_tRNA_synth_type1; 1.
DR   InterPro; IPR004364; Aa-tRNA-synt_II.
DR   InterPro; IPR006195; aa-tRNA-synth_II.
DR   InterPro; IPR045864; aa-tRNA-synth_II/BPL/LPL.
DR   InterPro; IPR004524; Asp-tRNA-ligase_1.
DR   InterPro; IPR002312; Asp/Asn-tRNA-synth_IIb.
DR   InterPro; IPR004115; GAD-like_sf.
DR   InterPro; IPR029351; GAD_dom.
DR   InterPro; IPR012340; NA-bd_OB-fold.
DR   InterPro; IPR004365; NA-bd_OB_tRNA.
DR   PANTHER; PTHR22594:SF5; PTHR22594:SF5; 1.
DR   Pfam; PF02938; GAD; 1.
DR   Pfam; PF00152; tRNA-synt_2; 1.
DR   Pfam; PF01336; tRNA_anti-codon; 1.
DR   PRINTS; PR01042; TRNASYNTHASP.
DR   SUPFAM; SSF50249; SSF50249; 1.
DR   SUPFAM; SSF55261; SSF55261; 1.
DR   SUPFAM; SSF55681; SSF55681; 1.
DR   TIGRFAMs; TIGR00459; aspS_bact; 1.
DR   PROSITE; PS50862; AA_TRNA_LIGASE_II; 1.
PE   3: Inferred from homology;
KW   Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase;
KW   Nucleotide-binding; Protein biosynthesis; Reference proteome.
FT   CHAIN           1..591
FT                   /note="Aspartate--tRNA(Asp/Asn) ligase 2"
FT                   /id="PRO_0000235572"
FT   REGION          206..209
FT                   /note="Aspartate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         182
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         228..230
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         228
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         237
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         455
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         489
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         496
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   BINDING         541..544
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   SITE            38
FT                   /note="Important for tRNA non-discrimination"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
FT   SITE            90
FT                   /note="Important for tRNA non-discrimination"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00044"
SQ   SEQUENCE   591 AA;  67123 MW;  271B104C5AC7CC8A CRC64;
     MSDFITIKKR THYCGQLDSS DSGKEVILMG WVHRRRDHGG VIFVDFRDRE GLVQIVFNPE
     YSPVAHQEAH KIRSEYVLAV RGAVRNRPEG MVNPDMKTGA IEVMVEELEI LNESQTPPFS
     LESESDISEN IRLKYRYLDL RRPQIQRNIM LRNRVAAETR QFFQSNGFIE IETPFLTKST
     PEGARDYLVP SRINKGTFYA LPQSPQIFKQ LLMVSGFDRY FQIVKCFRDE DLRADRQPEF
     TQIDVEMSFI TEDDIIEIME GLMTHLFSRC LNRTFSTPFP RLSYAEAIGR YGKDNPDIRF
     GLELRDLTDI LADSGLTVFR EAAAGGGMIK AIRIPEGKRL SRKDLDDLQN FVSIYGARGL
     AWARVLADGW TSPIFKFLTA DEVRQINGRM EAVEGDVLVF VADTPTVVND SLGNLRIHLA
     KKLNLIDPEQ FAFVWITEFP LMEFSDTEKR YVSTHHPFTS PVPDDVKYLP GEPGKVRARA
     YDLVLNGSEV GGGSIRIHRK EIQSLIFEAL GLENEEVRSK FGFLLDALEF GTPPHGGIAF
     GLDRLVMMMT GAESIRDVIA FPKTQKATCL MTDAPSRVSI EQLMELSLKI V