Structure of PDB 3nak Chain A

Receptor sequence

>3nakA (length=595) Species: 9925 (Capra hircus)

SWEVGCGAPVPLVTCDEQSPYRTITGDCNNRRSPALGAANRALARWLPAE
YEDGLAVPFGWTQRKTRNGFRVPLAREVSNKIVGYLDEEGVLDQNRSLLF
MQWGQIVDHDLDFAPETELGSSEHSKVQCEEYCVQGDECFPIMFPKNDPK
LKTQGKCMPFFRAGFVCPTPPYQSLARDQINAVTSFLDASLVYGSEPSLA
SRLRNLSSPLGLMAVNQEAWDHGLAYPPFNNVKPSPCEFINTTAHVPCFQ
AGDSRASEQILLATVHTLLLREHNRLARELKRLNPHWDGEMLYQEARKIL
GAFIQIITFRDYLPIVLGSEMQKWIPPYQGYNNSVDPRISNVFTFAFRFG
HMEVPSTVSRLDENYQPWGPEAELPLHTLFFNTWRIIKDGGIDPLVRGLL
AKNSKLMNQNKMVTSELRNKLFQPTHKVHGFDLAAINLQRCRDHGMPGYN
SWRGFCGLSQPKTLKGLQAVLKNKVLAKKLLDLYKTPDNIDIWIGGNAEP
MVERGRVGPLLACLLGRQFQQIRDGDRFWWENPGVFTEKQRDSLQKVSFS
RLICDNTHITKVPLHAFQANNYPHDFVDCSAVDKLDLSPWASREN

3D structure

• PDB: 3nak Crystal structure of the complex of goat lactoperoxidase with hypothiocyanite at 3.3 A resolution
• Chain: A
• Resolution: 3.3 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): Q105 D108 H109 D110 T184 F186 D188 S190 R255 E258 H351
• Catalytic site (residue number reindexed from 1): Q105 D108 H109 D110 T184 F186 D188 S190 R255 E258 H351
• Enzyme Commision number: 1.11.1.7: peroxidase.

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	CA	A	D110 T184 F186 D188 S190	D110 T184 F186 D188 S190
BS02	HEM	A	M101 G104 Q105 D108 D112 F113 A114 R255 E258 Q259 T344 R348 H351 F380 R440	M101 G104 Q105 D108 D112 F113 A114 R255 E258 Q259 T344 R348 H351 F380 R440
BS03	OSM	A	H109 R255 E258	H109 R255 E258

Gene Ontology

Molecular Function

• GO:0004601 peroxidase activity
• GO:0020037 heme binding

Biological Process

• GO:0006979 response to oxidative stress

External links

• PDB: RCSB:3nak, PDBe:3nak, PDBj:3nak
• PDBsum: 3nak
• UniProt: A0A452E9Y6|PERL_CAPHI Lactoperoxidase (Gene Name=LPO)