ID A4N022_HAEIF Unreviewed; 268 AA.
AC A4N022;
DT 15-MAY-2007, integrated into UniProtKB/TrEMBL.
DT 15-MAY-2007, sequence version 1.
DT 24-JAN-2024, entry version 85.
DE RecName: Full=Tryptophan synthase alpha chain {ECO:0000256|HAMAP-Rule:MF_00131};
DE EC=4.2.1.20 {ECO:0000256|HAMAP-Rule:MF_00131};
GN Name=trpA {ECO:0000256|HAMAP-Rule:MF_00131};
GN ORFNames=CGSHi22121_08573 {ECO:0000313|EMBL:EDJ88067.1};
OS Haemophilus influenzae 22.1-21.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Pasteurellales;
OC Pasteurellaceae; Haemophilus.
OX NCBI_TaxID=374927 {ECO:0000313|EMBL:EDJ88067.1, ECO:0000313|Proteomes:UP000004131};
RN [1] {ECO:0000313|EMBL:EDJ88067.1, ECO:0000313|Proteomes:UP000004131}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=22.1-21 {ECO:0000313|EMBL:EDJ88067.1,
RC ECO:0000313|Proteomes:UP000004131};
RX PubMed=17550610; DOI=10.1186/gb-2007-8-6-r103;
RA Hogg J.S., Hu F.Z., Janto B., Boissy R., Hayes J., Keefe R., Post J.C.,
RA Ehrlich G.D.;
RT "Characterization and modeling of the Haemophilus influenzae core and
RT supragenomes based on the complete genomic sequences of Rd and 12 clinical
RT nontypeable strains.";
RL Genome Biol. 8:R103.1-R103.18(2007).
CC -!- FUNCTION: The alpha subunit is responsible for the aldol cleavage of
CC indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate.
CC {ECO:0000256|HAMAP-Rule:MF_00131}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(1S,2R)-1-C-(indol-3-yl)glycerol 3-phosphate + L-serine = D-
CC glyceraldehyde 3-phosphate + H2O + L-tryptophan;
CC Xref=Rhea:RHEA:10532, ChEBI:CHEBI:15377, ChEBI:CHEBI:33384,
CC ChEBI:CHEBI:57912, ChEBI:CHEBI:58866, ChEBI:CHEBI:59776; EC=4.2.1.20;
CC Evidence={ECO:0000256|ARBA:ARBA00000003, ECO:0000256|HAMAP-
CC Rule:MF_00131};
CC -!- PATHWAY: Amino-acid biosynthesis; L-tryptophan biosynthesis; L-
CC tryptophan from chorismate: step 5/5. {ECO:0000256|ARBA:ARBA00004733,
CC ECO:0000256|HAMAP-Rule:MF_00131}.
CC -!- SUBUNIT: Tetramer of two alpha and two beta chains.
CC {ECO:0000256|ARBA:ARBA00011270, ECO:0000256|HAMAP-Rule:MF_00131}.
CC -!- SIMILARITY: Belongs to the TrpA family. {ECO:0000256|HAMAP-
CC Rule:MF_00131, ECO:0000256|RuleBase:RU003662}.
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DR EMBL; AAZD01000004; EDJ88067.1; -; Genomic_DNA.
DR AlphaFoldDB; A4N022; -.
DR UniPathway; UPA00035; UER00044.
DR Proteomes; UP000004131; Unassembled WGS sequence.
DR GO; GO:0004834; F:tryptophan synthase activity; IEA:UniProtKB-UniRule.
DR CDD; cd04724; Tryptophan_synthase_alpha; 1.
DR Gene3D; 3.20.20.70; Aldolase class I; 1.
DR HAMAP; MF_00131; Trp_synth_alpha; 1.
DR InterPro; IPR013785; Aldolase_TIM.
DR InterPro; IPR011060; RibuloseP-bd_barrel.
DR InterPro; IPR018204; Trp_synthase_alpha_AS.
DR InterPro; IPR002028; Trp_synthase_suA.
DR NCBIfam; TIGR00262; trpA; 1.
DR PANTHER; PTHR43406:SF1; TRYPTOPHAN SYNTHASE ALPHA CHAIN, CHLOROPLASTIC; 1.
DR PANTHER; PTHR43406; TRYPTOPHAN SYNTHASE, ALPHA CHAIN; 1.
DR Pfam; PF00290; Trp_syntA; 1.
DR SUPFAM; SSF51366; Ribulose-phoshate binding barrel; 1.
DR PROSITE; PS00167; TRP_SYNTHASE_ALPHA; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW Rule:MF_00131};
KW Aromatic amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023141,
KW ECO:0000256|HAMAP-Rule:MF_00131};
KW Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000256|HAMAP-Rule:MF_00131};
KW Tryptophan biosynthesis {ECO:0000256|ARBA:ARBA00022822, ECO:0000256|HAMAP-
KW Rule:MF_00131}.
FT ACT_SITE 49
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00131"
FT ACT_SITE 60
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00131"
SQ SEQUENCE 268 AA; 28747 MW; 40D3E2DFFD858317 CRC64;
MSRFETQFAT LNAKNEGAFV PFVTLCDPTF DHSFEIICTL VDNGADALEL GFPFSDPLLD
GPVIQAANNR ALTAGHSSED SFKLLEKVRS KYPEIPISLL LCANLIFAKG LDAFYQRCAE
VGVDAVLVAD IPLLAKGDYV QTAKKHGIQP VFICPPNADE ETIQGVAKNS EGYTYLVSRA
GVTSAENQAH AANLDTLVEQ LKAHNAPPIL QGFGIAQPEQ VKEALSLGAA GAISGSATVK
IIERNLDNHE QCLTELAEFV QTMKAATK
//
