Structure of PDB 3iaf Chain B

Receptor sequence

>3iafB (length=554) Species: 294 (Pseudomonas fluorescens) [Search protein sequence]

AMITGGELVVRTLIKAGVEHLFGLHGSHIDTIFQACLDHDVPIIDTRHEA
AAGHAAEGYARAGAKLGVALVTAGGGFTNAVTPIANAWLDRTPVLFLTGS
GALRDDETNTLQAGIDQVAMAAPITKWAHRVMATEHIPRLVMQAIRAALS
APRGPVLLDLPWDILMNQIDEDSVIIPDLVLSAHGARPDPADLDQALALL
RKAERPVIVLGSEASRTARKTALSAFVAATGVPVFADYEGLSMLSGLPDA
MRGGLVQNLYSFAKADAAPDLVLMLGARFGLNTGHGSGQLIPHSAQVIQV
DPDACELGRLQGIALGIVADVGGTIEALAQATAQDAAWPDRGDWCAKVTD
LAQERYASIAAKSSSEHALHPFHASQVIAKHVDAGVTVVADGALTYLWLS
EVMSRVKPGGFLCHGYLGSMGVGFGTALGAQVADLEAGRRTILVTGDGSV
GYSIGEFDTLVRKQLPLIVIIMNNQSWGATLHFQQLAVGPNRVTGTRLEN
GSYHGVAAAFGADGYHVDSVESFSAALAQALAHNRPACINVAVALDPIPP
EELI

3D structure

PDB

3iaf Active-site engineering of benzaldehyde lyase shows that a point mutation can confer both new reactivity and susceptibility to mechanism-based inhibition.

Chain

Resolution

2.8 Å

3D
structure

Catalytic site residues are labeled in the structure
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Enzymatic activity

Catalytic site (original residue number in PDB)	L25 G27 S28 H29 I30 E50 T73 L112 Q113 A114 G115 W163 L256 T284 G393 G419 M421 D448 N475 S477 W478 A480 T481 F484 L546
Catalytic site (residue number reindexed from 1)	L24 G26 S27 H28 I29 E49 T72 L111 Q112 A113 G114 W162 L255 T283 G392 G418 M420 D447 N474 S476 W477 A479 T480 F483 L545
Enzyme Commision number	4.1.2.38: benzoin aldolase.

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	TPP	B	H26 E50 T73 G76 G77	H25 E49 T72 G75 G76	PDBbind-CN: -logKd/Ki=2.92,Ki=1.2mM
BS02	TPP	B	L395 T396 G419 S420 M421 G447 D448 G449 S450 N475 S477 W478 G479 T481	L394 T395 G418 S419 M420 G446 D447 G448 S449 N474 S476 W477 G478 T480	PDBbind-CN: -logKd/Ki=2.92,Ki=1.2mM
BS03	MG	B	D448 N475	D447 N474

Gene Ontology

	Molecular Function
GO:0000287	magnesium ion binding
GO:0003824	catalytic activity
GO:0003984	acetolactate synthase activity
GO:0016829	lyase activity
GO:0030976	thiamine pyrophosphate binding
GO:0046872	metal ion binding
GO:0050660	flavin adenine dinucleotide binding

	Biological Process
GO:0009097	isoleucine biosynthetic process
GO:0009099	L-valine biosynthetic process
GO:0019752	carboxylic acid metabolic process

	Cellular Component
GO:0005948	acetolactate synthase complex

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Molecular Function

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Biological Process

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Cellular Component

External links

PDB	RCSB:3iaf, PDBe:3iaf, PDBj:3iaf
PDBsum	3iaf
PubMed	20030408
UniProt	Q9F4L3

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