1NSI	Oxidoreductase	date	Jan 10, 1999
title	Human Inducible Nitric Oxide Synthase, Zn-Bound, L-Arg Compl
authors	H.Li, C.S.Raman, C.B.Glaser, E.Blasko, T.A.Young, J.F.Parkinson, M T.L.Poulos
compound		source
Molecule: Protein (Nitric Oxide Synthase) Chain: A, B, C, D Fragment: Heme Domain Synonym: Inos Ec: 1.14.13.39 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Cell: Adenocarcinoma Dld-1 Expression_system: Escherichia Coli Expression_system_taxid: 562
symmetry	Space Group: P 43 21 2	R_factor 0.209 R_Free 0.243
crystal cell	length a length b length c angle alpha angle beta angle gamma 187.350 187.350 227.490 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.55 Å
ligand	ARG, GOL, H4B, HEM, SO4, ZN	enzyme	Oxidoreductase E.C.1.14.13.39 BRENDA
related structures	by homologous chain: 1K2S, 1M9J
Primary reference	Crystal structures of zinc-free and -bound heme domain of human inducible nitric-oxide synthase. Implications for dimer stability and comparison with endothelial nitric-oxide synthase., Li H, Raman CS, Glaser CB, Blasko E, Young TA, Parkinson JF, Whitlow M, Poulos TL, J Biol Chem 1999 Jul 23;274(30):21276-84. PMID:10409685

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (299 Kb) [Save to disk] Biological Unit Coordinates (1nsi.pdb1.gz) 291 Kb LPC: Ligand-Protein Contacts for 1NSI CSU: Contacts of Structural Units for 1NSI Likely Quarternary Molecular Structure file(s) for 1NSI Retrieve 1NSI in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1NSI from S2C, [Save to disk]

View 1NSI 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 1NSI

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 1NSI, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1nsia_, region A [Jmol] [rasmolscript] [script source]     - Domain d1nsib_, region B [Jmol] [rasmolscript] [script source]     - Domain d1nsic_, region C [Jmol] [rasmolscript] [script source]     - Domain d1nsid_, region D [Jmol] [rasmolscript] [script source] Fold representative 1nsi 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: [1nsi_A] [1nsi_B] [1nsi_C] [1nsi_D] SWISS-PROT database: [P35228] Domain organization of [NOS2_HUMAN] by SWISSPFAM Alignments of the sequence of 1NSI with the sequences similar proteins can be viewed for 1NSI'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 1NSI

Community annotation for 1NSI at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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