Structure of PDB 5cgq Chain B

Receptor sequence

>5cgqB (length=390) Species: 90371 (Salmonella enterica subsp. enterica serovar Typhimurium)

TTLLNPYFGEFGGMYVPQILMPALNQLEEAFVSAQKDPEFQAQFADLLKN
YAGRPTALTKCQNITAGTRTTLYLKREDLLHGGAHKTNQVLGQALLAKRM
GKSEIIAETGAGQHGVASALASALLGLKCRIYMGAKDVERQSPNVFRMRL
MGAEVIPVHSGSATLKDACNEALRDWSGSYETAHYMLGTAAGPHPYPTIV
REFQRMIGEETKAQILDKEGRLPDAVIACVGGGSNAIGMFADFINDTSVG
LIGVEPGGHGIETGEHGAPLKHGRVGIYFGMKAPMMQTADGQIEESYSIS
AGLDFPSVGPQHAYLNSIGRADYVSITDDEALEAFKTLCRHEGIIPALES
SHALAHALKMMREQPEKEQLLVVNLSGRGDKDIFTVHDIL

3D structure

• PDB: 5cgq Crystal structure of Tryptophan Synthase from Salmonella typhimurium in complex with F9 ligand and the product L-Tryptophan in the beta-site.
• Chain: B
• Resolution: 1.18 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): K87 E109 S377
• Catalytic site (residue number reindexed from 1): K86 E108 S376
• Enzyme Commision number: 4.2.1.20: tryptophan synthase.

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	PLP	B	H86 K87 T190 G232 G234 S235 N236 E350 S377 G378	H85 K86 T189 G231 G233 S234 N235 E349 S376 G377
BS02	TRP	B	K87 E109 T110 G111 A112 Q114 H115 L166 T190 F306	K86 E108 T109 G110 A111 Q113 H114 L165 T189 F305

Gene Ontology

Molecular Function

• GO:0004834 tryptophan synthase activity
• GO:0005515 protein binding
• GO:0016829 lyase activity
• GO:0042802 identical protein binding

Biological Process

• GO:0000162 tryptophan biosynthetic process
• GO:0006568 tryptophan metabolic process

Cellular Component

• GO:0005737 cytoplasm

External links

• PDB: RCSB:5cgq, PDBe:5cgq, PDBj:5cgq
• PDBsum: 5cgq
• UniProt: P0A2K1|TRPB_SALTY Tryptophan synthase beta chain (Gene Name=trpB)