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(-) Description

Title :  THE STRUCTURE OF CYANOBACTERIAL PSBP
 
Authors :  F. Michoux, K. Takasaka, P. Nixon, J. W. Murray
Date :  03 Apr 10  (Deposition) - 25 Aug 10  (Release) - 11 May 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.80
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (2x)
Biol. Unit 2:  A  (1x)
Keywords :  Photosynthesis, Zinc-Binding, Photosystem (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  F. Michoux, K. Takasaka, M. Boehm, P. Nixon, J. W. Murray
The Structure Of Cyanop At 2. 8A: Implications For The Evolution And Function Of The Psbp Subunit Of Photosystem Ii.
Biochemistry V. 49 7411 2010
PubMed-ID: 20698571  |  Reference-DOI: 10.1021/BI1011145

(-) Compounds

Molecule 1 - PSBP PROTEIN
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPRSET-A
    Expression System StrainKRX
    Expression System Taxid562
    FragmentRESIDUES 19-183
    Organism ScientificTHERMOSYNECHOCOCCUS ELONGATUS
    Organism Taxid197221
    StrainBP-1

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit A
Biological Unit 1 (2x)A
Biological Unit 2 (1x)A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 5)

Asymmetric Unit (1, 5)
No.NameCountTypeFull Name
1ZN5Ligand/IonZINC ION
Biological Unit 1 (0, 0)
No.NameCountTypeFull Name
1ZN-1Ligand/IonZINC ION
Biological Unit 2 (0, 0)
No.NameCountTypeFull Name
1ZN-1Ligand/IonZINC ION

(-) Sites  (5, 5)

Asymmetric Unit (5, 5)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP A:31 , ASP A:34 , ASP A:54 , GLU A:164BINDING SITE FOR RESIDUE ZN A1001
2AC2SOFTWAREHIS A:58 , THR A:63 , GLU A:87 , ASP A:91 , HOH A:2019BINDING SITE FOR RESIDUE ZN A1002
3AC3SOFTWAREGLU A:170 , LYS A:174 , HOH A:2014BINDING SITE FOR RESIDUE ZN A1003
4AC4SOFTWAREHIS A:142 , GLU A:163 , HOH A:2020BINDING SITE FOR RESIDUE ZN A1004
5AC5SOFTWAREASP A:59BINDING SITE FOR RESIDUE ZN A1005

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2XB3)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric Unit
No.Residues
1Asp A:51 -Pro A:52

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2XB3)

(-) PROSITE Motifs  (0, 0)

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(-) Exons   (0, 0)

(no "Exon" information available for 2XB3)

(-) Sequences/Alignments

Asymmetric 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
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Chain A from PDB  Type:PROTEIN  Length:155
 aligned with Q8DH84_THEEB | Q8DH84 from UniProtKB/TrEMBL  Length:183

    Alignment length:160
                                    33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183
         Q8DH84_THEEB    24 SGLQAYVDSYDGYEFLYPRGWVQVQVEDPVDVVFHDIIETTENVSVVVNTVASTKSLEELGSPEEVGDRLLRNIIAPSESGRSSALIAATSQKADDKTYYILEYAVTLPGDGNTAQQRHNLSSIAVSRGKVYTLSVSAPEERWPKVEDQFKTIVSSFTVY 183
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains PsbP-2xb3A01 A:24-183                                                                                                                                            Pfam domains
         Sec.struct. author ..eeeeee....eeeeee..eeee.....eeeeeee......eeeeeeee......hhhhhhhhhhhhhhhhhh........eeeeeeeeeeee..eeeeeeeeeee..-----..eeeeeeeeeee..eeeeeeeeee..hhhhhhhhhhhhhhh.ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2xb3 A  24 SGLQAYVDSYDGYEFLYPRGWVQVQVEDPVDVVFHDIIETTENVSVVVNTVASTKSLEELGSPEEVGDRLLRNIIAPSESGRSSALIAATSQKADDKTYYILEYAVTLP-----AQQRHNLSSIAVSRGKVYTLSVSAPEERWPKVEDQFKTIVSSFTVY 183
                                    33        43        53        63        73        83        93       103       113       123        |-    |  143       153       163       173       183
                                                                                                                                      132   138                                             

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  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (0, 0)

(no "SCOP Domain" information available for 2XB3)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2XB3)

(-) Pfam Domains  (1, 1)

Asymmetric Unit

(-) Gene Ontology  (6, 6)

Asymmetric Unit(hide GO term definitions)
Chain A   (Q8DH84_THEEB | Q8DH84)
molecular function
    GO:0005509    calcium ion binding    Interacting selectively and non-covalently with calcium ions (Ca2+).
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
biological process
    GO:0015979    photosynthesis    The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
cellular component
    GO:0019898    extrinsic component of membrane    The component of a membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.
    GO:0009523    photosystem II    A photosystem that contains a pheophytin-quinone reaction center with associated accessory pigments and electron carriers. In cyanobacteria and chloroplasts, in the presence of light, PSII functions as a water-plastoquinone oxidoreductase, transferring electrons from water to plastoquinone, whereas other photosynthetic bacteria carry out anoxygenic photosynthesis and oxidize other compounds to re-reduce the photoreaction center.
    GO:0009654    photosystem II oxygen evolving complex    A complex, composed of a cluster of manganese, calcium and chloride ions bound to extrinsic proteins, that catalyzes the splitting of water to O2 and 4 H+. In cyanobacteria there are five extrinsic proteins in OEC (PsbO, PsbP-like, PsbQ-like, PsbU and PsbV), while in plants there are only three (PsbO, PsbP and PsbQ).

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