Structure of PDB 6pna Chain A

Receptor sequence

>6pnaA (length=415) Species: 9606 (Homo sapiens)

CPRFLKVKNWETEVVLTDTLHLKSTLETGCTEYICMGSIMHPPEDVATKD
QLFPLAKEFIDQYYSSIKRFGSKAHMERLEEVNKEIDTTSTYQLKDTELI
YGAKHAWRNASRCVGRIQWSKLQVFDARDCTTAHGMFNYICNHVKYATNK
GNLRSAITIFPQRTDGKHDFRVWNSQLIRYAGYKQPDGSTLGDPANVQFT
EICIQQGWKPPRGRFDVLPLLLQANGNDPELFQIPPELVLEVPIRHPKFE
WFKDLGLKWYGLPAVSNMLLEIGGLEFSACPFSGWYMGTEIGVRDYCDNS
RYNILEEVAKKMNLDMRKTSSLWKDQALVEINIAVLYSFQSDKVTIVDHH
SATESFIKHMENEYRCRGGCPADWVWIVPPMSGSITPVFHQEMLNYRLTP
SFEYQPDPWNTHVWK

3D structure

• PDB: 6pna First Contact: 7-Phenyl-2-Aminoquinolines, Potent and Selective Neuronal Nitric Oxide Synthase Inhibitors That Target an Isoform-Specific Aspartate.
• Chain: A
• Resolution: 1.95 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): C420 R423 W592 E597
• Catalytic site (residue number reindexed from 1): C113 R116 W285 E290
• Enzyme Commision number: 1.14.13.39: nitric-oxide synthase (NADPH).

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	HEM	A	W414 R419 C420 F589 W592 E597 W683 F709 Y711	W107 R112 C113 F282 W285 E290 W376 F402 Y404
BS02	H4B	A	S339 R601 V682 W683	S38 R294 V375 W376
BS03	M16	A	P570 V572 F589 W592 E597	P263 V265 F282 W285 E290	MOAD: Ki=0.122uM
BS04	ZN	A	C331 C336	C30 C35
BS05	H4B	A	F696 H697 Q698	F389 H390 Q391

Gene Ontology

Molecular Function

• GO:0004517 nitric-oxide synthase activity

Biological Process

• GO:0006809 nitric oxide biosynthetic process

External links

• PDB: RCSB:6pna, PDBe:6pna, PDBj:6pna
• PDBsum: 6pna
• PubMed: 32302123
• UniProt: P29475|NOS1_HUMAN Nitric oxide synthase 1 (Gene Name=NOS1)