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Receptor Information

>3pi3 Chain A (length=151) Species: 244486 (Phacoides pectinatus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]

TTLTNPQKAAIRSSWSKFMDNGVSNGQGFYMDLFKAHPETLTPFKSLFGG
LTLAQLQDNPKMKAQSLVFCNGMSSFVDHLDDNDMLVVLIQKMAKLHNNR
GIRASDLRTAYDILIHYMEDHNHMVGGAKDAWEVFVGFICKTLGDYMKEL
S

Ligand ID

HEM

InChI

InChI=1S/C34H34N4O4.Fe/c1-7-21-17(3)25-13-26-19(5)23(9-11-33(39)40)31(37-26)16-32-24(10-12-34(41)42)20(6)28(38-32)15-30-22(8-2)18(4)27(36-30)14-29(21)35-25;/h7-8,13-16H,1-2,9-12H2,3-6H3,(H4,35,36,37,38,39,40,41,42);/q;+2/p-2/b25-13-,26-13-,27-14-,28-15-,29-14-,30-15-,31-16-,32-16-;

InChIKey

KABFMIBPWCXCRK-RGGAHWMASA-L

SMILES

Software	SMILES
OpenEye OEToolkits 1.7.6	Cc1c2n3c(c1CCC(=O)O)C=C4C(=C(C5=[N]4[Fe]36[N]7=C(C=C8N6C(=C5)C(=C8C)C=C)C(=C(C7=C2)C)C=C)C)CCC(=O)O
CACTVS 3.385	CC1=C(CCC(O)=O)C2=Cc3n4[Fe]5\|6\|N2=C1C=c7n5c(=CC8=N\|6C(=Cc4c(C)c3CCC(O)=O)C(=C8C=C)C)c(C)c7C=C
ACDLabs 12.01	C=1c3c(c(c4C=C5C(=C(C=6C=C7C(=C(C8=CC=2C(=C(C=1N=2[Fe](n34)(N5=6)N78)CCC(=O)O)C)\C=C)C)\C=C)C)C)CCC(=O)O

Formula

C34 H32 Fe N4 O4

Name

PROTOPORPHYRIN IX CONTAINING FE;
HEME

PDB chain

3pi3 Chain A Residue 500 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]

Receptor-Ligand Complex Structure

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Structure summary

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PDB	3pi3 Two-step counterdiffusion protocol for the crystallization of heamoglobin II from Lucina pectinata in the pH range 4-9
Resolution	1.95 Å
Binding residue (original residue number in PDB)	P43 F44 L47 Q65 V68 F69 L96 H97 R100 I102 L107 A110 Y111
Binding residue (residue number reindexed from 1)	P43 F44 L47 Q65 V68 F69 L96 H97 R100 I102 L107 A110 Y111
Annotation score	4

Enzyme Commision number

	Molecular Function
GO:0019825	oxygen binding
GO:0020037	heme binding

PDB	RCSB:3pi3, PDBe:3pi3, PDBj:3pi3
PDBsum	3pi3
PubMed
UniProt	P41261\|GLB2_PHAPT Hemoglobin-2

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Structure of PDB 3pi3 Chain A Binding Site BS01