ID   B1LHX7_ECOSM            Unreviewed;       356 AA.
AC   B1LHX7;
DT   29-APR-2008, integrated into UniProtKB/TrEMBL.
DT   29-APR-2008, sequence version 1.
DT   27-MAR-2024, entry version 98.
DE   RecName: Full=Alanine racemase {ECO:0000256|HAMAP-Rule:MF_01201};
DE            EC=5.1.1.1 {ECO:0000256|HAMAP-Rule:MF_01201};
GN   Name=alr1 {ECO:0000313|EMBL:ACB17689.1};
GN   OrderedLocusNames=EcSMS35_1959 {ECO:0000313|EMBL:ACB17689.1};
OS   Escherichia coli (strain SMS-3-5 / SECEC).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=439855 {ECO:0000313|EMBL:ACB17689.1, ECO:0000313|Proteomes:UP000007011};
RN   [1] {ECO:0000313|EMBL:ACB17689.1, ECO:0000313|Proteomes:UP000007011}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SMS-3-5 / SECEC {ECO:0000313|Proteomes:UP000007011};
RX   PubMed=18708504; DOI=10.1128/JB.00661-08;
RA   Fricke W.F., Wright M.S., Lindell A.H., Harkins D.M., Baker-Austin C.,
RA   Ravel J., Stepanauskas R.;
RT   "Insights into the environmental resistance gene pool from the genome
RT   sequence of the multidrug-resistant environmental isolate Escherichia coli
RT   SMS-3-5.";
RL   J. Bacteriol. 190:6779-6794(2008).
CC   -!- FUNCTION: Catalyzes the interconversion of L-alanine and D-alanine. May
CC       also act on other amino acids. {ECO:0000256|HAMAP-Rule:MF_01201}.
CC   -!- FUNCTION: Isomerizes L-alanine to D-alanine which is then oxidized to
CC       pyruvate by DadA. {ECO:0000256|ARBA:ARBA00037715}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-alanine = D-alanine; Xref=Rhea:RHEA:20249,
CC         ChEBI:CHEBI:57416, ChEBI:CHEBI:57972; EC=5.1.1.1;
CC         Evidence={ECO:0000256|ARBA:ARBA00000316, ECO:0000256|HAMAP-
CC         Rule:MF_01201};
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000256|ARBA:ARBA00001933, ECO:0000256|HAMAP-
CC         Rule:MF_01201, ECO:0000256|PIRSR:PIRSR600821-50};
CC   -!- PATHWAY: Amino-acid biosynthesis; D-alanine biosynthesis; D-alanine
CC       from L-alanine: step 1/1. {ECO:0000256|HAMAP-Rule:MF_01201}.
CC   -!- SIMILARITY: Belongs to the alanine racemase family.
CC       {ECO:0000256|ARBA:ARBA00007880, ECO:0000256|HAMAP-Rule:MF_01201}.
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DR   EMBL; CP000970; ACB17689.1; -; Genomic_DNA.
DR   RefSeq; WP_000197872.1; NC_010498.1.
DR   AlphaFoldDB; B1LHX7; -.
DR   KEGG; ecm:EcSMS35_1959; -.
DR   HOGENOM; CLU_028393_1_0_6; -.
DR   UniPathway; UPA00042; UER00497.
DR   Proteomes; UP000007011; Chromosome.
DR   GO; GO:0008784; F:alanine racemase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0030632; P:D-alanine biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd06827; PLPDE_III_AR_proteobact; 1.
DR   Gene3D; 3.20.20.10; Alanine racemase; 1.
DR   HAMAP; MF_01201; Ala_racemase; 1.
DR   InterPro; IPR000821; Ala_racemase.
DR   InterPro; IPR009006; Ala_racemase/Decarboxylase_C.
DR   InterPro; IPR011079; Ala_racemase_C.
DR   InterPro; IPR001608; Ala_racemase_N.
DR   InterPro; IPR020622; Ala_racemase_pyridoxalP-BS.
DR   InterPro; IPR029066; PLP-binding_barrel.
DR   NCBIfam; TIGR00492; alr; 1.
DR   PANTHER; PTHR30511; ALANINE RACEMASE; 1.
DR   PANTHER; PTHR30511:SF0; ALANINE RACEMASE, CATABOLIC-RELATED; 1.
DR   Pfam; PF00842; Ala_racemase_C; 1.
DR   Pfam; PF01168; Ala_racemase_N; 1.
DR   PRINTS; PR00992; ALARACEMASE.
DR   SMART; SM01005; Ala_racemase_C; 1.
DR   SUPFAM; SSF50621; Alanine racemase C-terminal domain-like; 1.
DR   SUPFAM; SSF51419; PLP-binding barrel; 1.
DR   PROSITE; PS00395; ALANINE_RACEMASE; 1.
PE   3: Inferred from homology;
KW   Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01201};
KW   Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898, ECO:0000256|HAMAP-
KW   Rule:MF_01201}.
FT   DOMAIN          232..356
FT                   /note="Alanine racemase C-terminal"
FT                   /evidence="ECO:0000259|SMART:SM01005"
FT   ACT_SITE        35
FT                   /note="Proton acceptor; specific for D-alanine"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01201"
FT   ACT_SITE        253
FT                   /note="Proton acceptor; specific for L-alanine"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01201"
FT   BINDING         130
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01201,
FT                   ECO:0000256|PIRSR:PIRSR600821-52"
FT   BINDING         301
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01201,
FT                   ECO:0000256|PIRSR:PIRSR600821-52"
FT   MOD_RES         35
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01201,
FT                   ECO:0000256|PIRSR:PIRSR600821-50"
SQ   SEQUENCE   356 AA;  38890 MW;  D0085F7775EB2082 CRC64;
     MTRPIQASLD LQALKQNLSI VRQAAPRARV WSVVKANAYG HGIERIWSAL GATDGFALLN
     LEEAITLRER GWKGPILMLE GFFHAQDLEI YDQHRLTTCV HSNWQLKALQ NARLKAPLDI
     YLKVNSGMNR LGFQPDRVLT VWQQLRAMAN VGEMTLMSHF AEAEHPDGIS SAMARIEQAA
     EGLECRRSLS NSAATLWHPE AHFDWVRPGI ILYGASPSGQ WRDIANTGLR PVMTLSSEII
     GVQTLKAGER VGYGGRYTAR DEQRIGIVAA GYADGYPRHA PTGTPVLVDG VRTMTVGTVS
     MDMLAVDLTP CPQAGIGTPV ELWGKEIKID DVAAAAGTVG YELMCALALR VPVVTV
//