Structure of PDB 1jha Chain A

Receptor sequence

>1jhaA (length=346) Species: 28901 (Salmonella enterica)

LHALLRDIPAPDAEAMARTQQHIDGLLKPPGSLGRLETLAVQLAGMPGLN
GTPQVGEKAVLVMCADHGVWDEGVAVSPKIVTAIQAANMTRGTTGVCVLA
AQAGAKVHVIDVGIDAEPIPGVVNMRVARGCGNIAVGPAMSRLQAEALLL
EVSRYTCDLAQRGVTLFGVGELGMANTTPAAAMVSVFTGSDAKEVVGIGA
NLPPSRIDNKVDVVRRAIAINQPNPRDGIDVLSKVGGFDLVGMTGVMLGA
ARCGLPVLLDGFLSYSAALAACQIAPAVRPYLIPSHFSAEKGARIALAHL
SMEPYLHMAMRLGEGSGAALAMPIVEAACAMFHNMGELAASNIVLP

3D structure

• PDB: 1jha Structural investigation of the biosynthesis of alternative lower ligands for cobamides by nicotinate mononucleotide: 5,6-dimethylbenzimidazole phosphoribosyltransferase from Salmonella enterica.
• Chain: A
• Resolution: 2.0 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): E174 E317
• Catalytic site (residue number reindexed from 1): E171 E314
• Enzyme Commision number: 2.4.2.21: nicotinate-nucleotide--dimethylbenzimidazole phosphoribosyltransferase.

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	AAM	A	V84 Q88 E174 L175 G176 M177 A178 N179 T180 G202 A203 L315 E317	V81 Q85 E171 L172 G173 M174 A175 N176 T177 G199 A200 L312 E314
BS02	NIO	A	F265 L266 S291 R314 L315 G316	F262 L263 S288 R311 L312 G313

Gene Ontology

Molecular Function

• GO:0000166 nucleotide binding
• GO:0008939 nicotinate-nucleotide-dimethylbenzimidazole phosphoribosyltransferase activity
• GO:0016757 glycosyltransferase activity

Biological Process

• GO:0009236 cobalamin biosynthetic process

External links

• PDB: RCSB:1jha, PDBe:1jha, PDBj:1jha
• PDBsum: 1jha
• PubMed: 11441022
• UniProt: Q05603|COBT_SALTY Nicotinate-nucleotide--dimethylbenzimidazole phosphoribosyltransferase (Gene Name=cobT)