4NOS	Oxidoreductase	date	Feb 03, 1999
title	Human Inducible Nitric Oxide Synthase With Inhibitor
authors	T.O.Fischmann, P.C.Weber
compound		source
Molecule: Inducible Nitric Oxide Synthase Chain: A, B, C, D Fragment: Oxygenase Domain Synonym: Inos, Nos2 Ec: 1.14.13.39 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Pinos60-3
symmetry	Space Group: P 21 21 21	R_factor 0.199 R_Free 0.289
crystal cell	length a length b length c angle alpha angle beta angle gamma 89.759 156.672 190.044 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.25 Å
ligand	H2B, H4B, HEM, ITU, ZN BindingDB	enzyme	Oxidoreductase E.C.1.14.13.39 BRENDA
related structures	by homologous chain: 1DD7, 2NOS
Primary reference	Structural characterization of nitric oxide synthase isoforms reveals striking active-site conservation., Fischmann TO, Hruza A, Niu XD, Fossetta JD, Lunn CA, Dolphin E, Prongay AJ, Reichert P, Lundell DJ, Narula SK, Weber PC, Nat Struct Biol 1999 Mar;6(3):233-42. PMID:10074942

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (317 Kb) [Save to disk] Biological Unit Coordinates (4nos.pdb1.gz) 158 Kb Biological Unit Coordinates (4nos.pdb2.gz) 156 Kb LPC: Ligand-Protein Contacts for 4NOS CSU: Contacts of Structural Units for 4NOS Likely Quarternary Molecular Structure file(s) for 4NOS Retrieve 4NOS in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 4NOS from S2C, [Save to disk]

View 4NOS in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz. On AstexViewer, from MSD-EBI (viewer documentation). On RasMol (Install RasMol freeware) Here's help on how to use RasMol.

Visual 3D analysis of 4NOS

Cartoon representation from PDB Cartoon Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute Crystal Contacts, from CryCo at Weizmann Institute 3D motif for 4NOS, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d4nosa_, region A [Jmol] [rasmolscript] [script source]     - Domain d4nosb_, region B [Jmol] [rasmolscript] [script source]     - Domain d4nosc_, region C [Jmol] [rasmolscript] [script source]     - Domain d4nosd_, region D [Jmol] [rasmolscript] [script source] Fold representative 4nos from FSSP and Dali (Families of Structurally Similar Proteins) Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [4nos_A] [4nos_B] [4nos_C] [4nos_D] SWISS-PROT database: [P35228] Domain organization of [NOS2_HUMAN] by SWISSPFAM Alignments of the sequence of 4NOS with the sequences similar proteins can be viewed for 4NOS's classification [NOS2_HUMAN] at ProtoMap. Click on "Neighbors List", then on the "See Alignments" button below the list. A sequence distance tree ("phylogenetic tree") can be viewed for 1ACL's classification [NOS2_HUMAN] at ProtoMap. Click on the Cluster number.

Other resources with information on 4NOS

Community annotation for 4NOS at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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