Structure of PDB 3zku Chain A

Receptor sequence

>3zkuA (length=325) Species: 227321 (Aspergillus nidulans FGSC A4)

SVSKANVPKIDVSPLFGDDQAAKMRVAQQIDAASRDTGFFYAVNHGINVQ
RLSQKTKEFHMSITPEEKWDLAIRAYNKEHQDQVRAGYYLSIPGKKAVES
FCYLNPNFTPDHPRIQAKTPTHEVNVWPDETKHPGFQDFAEQYYWDVFGL
SSALLKGYALALGKEENFFARHFKPDDTLASVVLIRYPYLDPYPEAAIKT
AADGTKLSFEWHEDVSLITVLYQSNVQNLQVETAAGYQDIEADDTGYLIN
CGSYMAHLTNNYYKAPIHRVKWVNAERQSLPFFVNLGYDSVIDPFDPREP
NGKSDREPLSYGDYLQNGLVSLINK

3D structure

• PDB: 3zku The Interaction of Isopenicillin N Synthase with Homologated Substrate Analogues Delta-(L-Alpha-Aminoadipoyl)-L-Homocysteinyl-D-Xaa Characterised by Protein Crystallography.
• Chain: A
• Resolution: 1.4 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): L186 F211 H214 D216 H270
• Catalytic site (residue number reindexed from 1): L184 F209 H212 D214 H268
• Enzyme Commision number: 1.21.3.1: isopenicillin-N 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	FE	A	H214 D216 H270	H212 D214 H268
BS02	HCV	A	R87 S183 F211 H214 H270 F285 L324	R85 S181 F209 H212 H268 F283 L322

Gene Ontology

Molecular Function

• GO:0005506 iron ion binding
• GO:0016216 isopenicillin-N synthase activity
• GO:0016491 oxidoreductase activity
• GO:0031418 L-ascorbic acid binding
• GO:0046872 metal ion binding

Biological Process

• GO:0009058 biosynthetic process
• GO:0017000 antibiotic biosynthetic process
• GO:0042318 penicillin biosynthetic process
• GO:0044283 small molecule biosynthetic process

Cellular Component

• GO:0005737 cytoplasm
• GO:0005829 cytosol

External links

• PDB: RCSB:3zku, PDBe:3zku, PDBj:3zku
• PDBsum: 3zku
• PubMed: 23468426
• UniProt: P05326|IPNA_EMENI Isopenicillin N synthase (Gene Name=ipnA)