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(-) Description

Title :  CRYSTAL STRUCTURE OF D1A MUTANT OF NITROPHORIN 2 COMPLEXED WITH IMIDAZOLE
 
Authors :  A. Weichsel, R. E. Berry, F. A. Walker, W. R. Montfort
Date :  23 Aug 05  (Deposition) - 01 Aug 06  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.70
Chains :  Asym./Biol. Unit :  X
Keywords :  Beta Barrel, Lipocalin, Ferric Heme, Imidazole, Transport Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  A. Weichsel, R. E. Berry, F. A. Walker, W. R. Montfort
Crystal Structures, Ligand Induced Conformational Change And Heme Deformation In Complexes Of Nitrophorin 2, A Nitric Oxide Transport Protein From Rhodnius Prolixus
To Be Published
PubMed: search
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - NITROPHORIN 2
    Chains: X
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21(DE3)
    Expression System Plasmid: PET17B
    Expression System Strain: BL21(DE3)
    Expression System Taxid: 469008
    Expression System Vector Type: PLASMID
    Fragment: RESIDUES 25-202
    Organism Scientific: RHODNIUS PROLIXUS
    Organism Taxid: 13249
    Synonym: NP2, PROLIXIN-S

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit : X

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 2)

Asymmetric/Biological Unit (2, 2)
No.NameCountTypeFull Name
1HEM1Ligand/IonPROTOPORPHYRIN IX CONTAINING FE
2IMD1Ligand/IonIMIDAZOLE

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPHE X:27 , TYR X:38 , SER X:40 , LEU X:55 , HIS X:57 , TYR X:85 , LYS X:96 , TYR X:104 , ILE X:120 , LEU X:132 , IMD X:202 , HOH X:316 , HOH X:456 , HOH X:459 , HOH X:507 , HOH X:528BINDING SITE FOR RESIDUE HEM X 201
2AC2SOFTWAREHEM X:201 , HOH X:325BINDING SITE FOR RESIDUE IMD X 202

(-) SS Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1X:2 -X:121
2X:39 -X:170

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2ASN)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2ASN)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2ASN)

(-) Exons   (0, 0)

(no "Exon" information available for 2ASN)

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it) 
Chain X from PDB  Type:PROTEIN  Length:179
 aligned with NP2_RHOPR | Q26241 from UniProtKB/Swiss-Prot  Length:202

    Alignment length:179
                                    33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193         
            NP2_RHOPR    24 DCSTNISPKQGLDKAKYFSGKWYVTHFLDKDPQVTDQYCSSFTPRESDGTVKEALYHYNANKKTSFYNIGEGKLESSGLQYTAKYKTVDKKKAVLKEADEKNSYTLTVLEADDSSALVHICLREGSKDLGDLYTVLTHQKDAEPSAKVKSAVTQAGLQLSQFVGTKDLGCQYDDQFTSL 202
               SCOP domains d2asnx_ X: Nitrophorin 2 (prolixin-s)                                                                                                                                               SCOP domains
               CATH domains 2asnX00 X:1-179  [code=2.40.128.20, no name defined]                                                                                                                                CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ............hhhhhh...eeeeeee.........eeeeeeeeee..eeeeeeeeee....eeeeeeeeeee.....eeeeeeeee.....eee.....eeeeeeeeee...eeeeeeeeee..eeeeeeeeeee.......hhhhhhhhhhh..hhhhhee.hhhh...hhhhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2asn X   1 ACSTNISPKQGLDKAKYFSGKWYVTHFLDKDPQVTDQYCSSFTPRESDGTVKEALYHYNANKKTSFYNIGEGKLESSGLQYTAKYKTVDKKKAVLKEADEKNSYTLTVLEADDSSALVHICLREGSKDLGDLYTVLTHQKDAEPSAKVKSAVTQAGLQLSQFVGTKDLGCQYDDQFTSL 179
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170
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  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2ASN)

(-) Gene Ontology  (6, 6)

Asymmetric/Biological Unit(hide GO term definitions)
Chain X   (NP2_RHOPR | Q26241)
molecular function
    GO:0051381    histamine binding    Interacting selectively and non-covalently with histamine, a physiologically active amine, found in plant and animal tissue and released from mast cells as part of an allergic reaction in humans.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0070026    nitric oxide binding    Interacting selectively and non-covalently with nitric oxide (NO).
biological process
    GO:0050880    regulation of blood vessel size    Any process that modulates the size of blood vessels.
    GO:0042311    vasodilation    An increase in the internal diameter of blood vessels, especially arterioles or capillaries, due to relaxation of smooth muscle cells that line the vessels, and usually resulting in a decrease in blood pressure.
cellular component
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        NP2_RHOPR | Q26241: 1euo 1pee 1pm1 1t68 2a3f 2acp 2ah7 2al0 2all 2amm 2eu7 2gtf 2hys

(-) Related Entries Specified in the PDB File

1pee CRYSTAL STRUCTURE OF WILD-TYPE NITROPHORIN 2 COMPLEXED WITH IMIDAZOLE
1pm1 CRYSTAL STRUCTURE OF THE SAME PROTEIN L122V/L132V DOUBLE MUTANT COMPLEXED WITH IMIDAZOLE