Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Photosystem II D2 protein

Gene

psbD

Organism
Synechococcus phage syn9
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Photosystem II (PSII) is a light-driven water: plastoquinone oxidoreductase that uses light energy to abstract electrons from H2O, generating O2 and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbA) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors. D2 is needed for assembly of a stable PSII complex.By similarity

Catalytic activityi

2 H2O + 2 plastoquinone + 4 light = O2 + 2 plastoquinol.By similarity

Cofactori

Note: The D1/D2 heterodimer binds P680, chlorophylls that are the primary electron donor of PSII, and subsequent electron acceptors. It shares a non-heme iron and each subunit binds pheophytin, quinone, additional chlorophylls, carotenoids and lipids. There is also a Cl(-1) ion associated with D1 and D2, which is required for oxygen evolution. The PSII complex binds additional chlorophylls, carotenoids and specific lipids.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi116Magnesium (chlorophyll-a ChlzD2, axial ligand; peripheral); via tele nitrogenBy similarity1
Binding sitei128Pheophytin D2By similarity1
Binding sitei141Pheophytin D2By similarity1
Metal bindingi196Magnesium (chlorophyll-a PD2 axial ligand); via tele nitrogenBy similarity1
Metal bindingi213Iron; shared with heterodimeric partner; via tele nitrogenBy similarity1
Binding sitei213Plastoquinone Q(A)By similarity1
Binding sitei260Plastoquinone Q(A); via amide nitrogenBy similarity1
Metal bindingi267Iron; shared with heterodimeric partner; via tele nitrogenBy similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processElectron transport, Photosynthesis, Transport
LigandChlorophyll, Chromophore, Iron, Magnesium, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II D2 protein (EC:1.10.3.9)
Short name:
PSII D2 protein
Alternative name(s):
Photosystem Q(A) protein
Gene namesi
Name:psbD
OrganismiSynechococcus phage syn9
Taxonomic identifieri382359 [NCBI]
Taxonomic lineageiVirusesdsDNA viruses, no RNA stageCaudoviralesMyoviridaeTevenvirinaeT4virus
Virus hostiSynechococcus [TaxID: 1129]
Proteomesi
  • UP000000909 Componenti: Genome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei39 – 59HelicalBy similarityAdd BLAST21
Transmembranei123 – 139HelicalBy similarityAdd BLAST17
Transmembranei151 – 164HelicalBy similarityAdd BLAST14
Transmembranei206 – 226HelicalBy similarityAdd BLAST21
Transmembranei277 – 293HelicalBy similarityAdd BLAST17

GO - Cellular componenti

Keywords - Cellular componenti

Host membrane, Host thylakoid, Membrane, Photosystem II

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003597131 – 351Photosystem II D2 proteinAdd BLAST351

Proteomic databases

PRIDEiQ0QZ08.

Interactioni

Subunit structurei

PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral proteins of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes.By similarity

Structurei

3D structure databases

ProteinModelPortaliQ0QZ08.
SMRiQ0QZ08.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the reaction center PufL/M/PsbA/D family.By similarity

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

OrthoDBiVOG090000BK.

Family and domain databases

Gene3Di1.20.85.10. 2 hits.
HAMAPiMF_01383. PSII_PsbD_D2. 1 hit.
InterProiView protein in InterPro
IPR000484. Photo_RC_L/M.
IPR005868. PSII_PsbD/D2.
PfamiView protein in Pfam
PF00124. Photo_RC. 1 hit.
PRINTSiPR00256. REACTNCENTRE.
SUPFAMiSSF81483. SSF81483. 1 hit.
TIGRFAMsiTIGR01152. psbD. 1 hit.

Sequencei

Sequence statusi: Complete.

Q0QZ08-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTTSTLQAPT RGWFDVLDDW LKRDRFVFVG WSGLLLFPTA YLAIGGWLTG
60 70 80 90 100
TTFVTSWYTH GLASSYLEGA NFLTAAVSTP ADAMGHSLLL LWGPESQGDF
110 120 130 140 150
IRWCQLGGLW AFVALHGAFA LIGFMLRQFE ISRLVGIRPY NAIAFSGPIA
160 170 180 190 200
VFVSVFLIYP LGQSSWFFAP SFGVAAIFRF LLFLQGFHNW TLNPFHMMGV
210 220 230 240 250
AGILGGALLS AIHGVTVENT LYEDGEQANT FKAFDTTQEE ETYSMVTANR
260 270 280 290 300
FWSQIFGIAF SNKRWLHFFM LFVPVMGLWT SSIGIIGLAL NLRAYDFVSQ
310 320 330 340 350
EVRAAEDPEF ETFYTKNILL NEGLRAWMAP VDQPHENFVF PEEVLPRGNA

L
Length:351
Mass (Da):39,318
Last modified:September 5, 2006 - v1
Checksum:i7759697E9B5B0E83
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
DQ149023 Genomic DNA. Translation: ABA47187.1.
RefSeqiYP_717887.1. NC_008296.2.

Genome annotation databases

GeneIDi4238985.
KEGGivg:4238985.

Similar proteinsi

Entry informationi

Entry nameiPSBD_BPSYS
AccessioniPrimary (citable) accession number: Q0QZ08
Entry historyiIntegrated into UniProtKB/Swiss-Prot: January 20, 2009
Last sequence update: September 5, 2006
Last modified: September 27, 2017
This is version 73 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families