1X8P	Ligand Binding Protein	date	Aug 18, 2004
title	0.85 A Crystal Structure Of Nitrophorin 4 From Rhodnius Prol Complexed With Ammonia At Ph 7.4
authors	D.A.Kondrashov, S.A.Roberts, A.Weichsel, W.R.Montfort
compound		source
Molecule: Nitrophorin 4 Chain: A Synonym: Np4 Engineered: Yes		Organism_scientific: Rhodnius Prolixus Organism_taxid: 13249 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21de3 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet17b
symmetry	Space Group: C 1 2 1	R_factor R_Free
crystal cell	length a length b length c angle alpha angle beta angle gamma 70.320 42.810 52.920 90.00 94.10 90.00
method	X-Ray Diffraction	resolution	0.85 Å
ligand	HEM, NH3	enzyme
related structures	by homologous chain: 1SY3, 1X8Q
Gene Ontology	Chain Function Process Component A
Primary reference	Protein functional cycle viewed at atomic resolution: conformational change and mobility in nitrophorin 4 as a function of pH and NO binding., Kondrashov DA, Roberts SA, Weichsel A, Montfort WR, Biochemistry 2004 Nov 2;43(43):13637-47. PMID:15504026

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (84 Kb) [Save to disk] Biological Unit Coordinates (1x8p.pdb1.gz) 79 Kb LPC: Ligand-Protein Contacts for 1X8P CSU: Contacts of Structural Units for 1X8P Likely Quarternary Molecular Structure file(s) for 1X8P Structure Factors (1843 Kb) Retrieve 1X8P in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1X8P from S2C, [Save to disk] Re-refined 1x8p structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1X8P 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.

Visual 3D analysis of 1X8P

Ramachandran plot from PDBSum

Structure-derived information

Conformational Epitope Prediction for 1X8P from the CEP Server. Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1X8P, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1x8pa_, region A [Jmol] [rasmolscript] [script source] 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: [1x8p] [1x8p_A] SWISS-PROT database: [Q94734] Domain organization of [NP4_RHOPR] by SWISSPFAM

Other resources with information on 1X8P

Community annotation for 1X8P at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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