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Protein

Photosystem II D2 protein

Gene

psbD

Organism
Chlamydomonas reinhardtii (Chlamydomonas smithii)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

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.UniRule annotation

Miscellaneous

2 of the reaction center chlorophylls (ChlD1 and ChlD2) are entirely coordinated by water.UniRule annotation

Catalytic activityi

2 H2O + 2 plastoquinone + 4 light = O2 + 2 plastoquinol.UniRule annotation

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.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi117Magnesium (chlorophyll-a ChlzD2, axial ligand; peripheral); via tele nitrogenUniRule annotation1
Binding sitei129Pheophytin D2UniRule annotation1
Binding sitei142Pheophytin D2UniRule annotation1
Metal bindingi197Magnesium (chlorophyll-a PD2 axial ligand); via tele nitrogenUniRule annotation1
Metal bindingi214Iron; shared with heterodimeric partner; via tele nitrogenUniRule annotation1
Binding sitei214Plastoquinone Q(A)UniRule annotation1
Binding sitei261Plastoquinone Q(A); via amide nitrogenUniRule annotation1
Metal bindingi268Iron; shared with heterodimeric partner; via tele nitrogenUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

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

Enzyme and pathway databases

BioCyciMetaCyc:CHRECP064-MONOMER

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II D2 proteinUniRule annotation (EC:1.10.3.9UniRule annotation)
Short name:
PSII D2 proteinUniRule annotation
Alternative name(s):
Photosystem Q(A) proteinUniRule annotation
Gene namesi
Name:psbDUniRule annotation
Encoded oniPlastid; Chloroplast
OrganismiChlamydomonas reinhardtii (Chlamydomonas smithii)
Taxonomic identifieri3055 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeChlorophytaChlorophyceaeChlamydomonadalesChlamydomonadaceaeChlamydomonas
Proteomesi
  • UP000006906 Componenti: Chloroplast

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cell wall Cytoskeleton Vacuole Chloroplast Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertion Graphics by Christian Stolte; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei40 – 60HelicalUniRule annotationAdd BLAST21
Transmembranei124 – 140HelicalUniRule annotationAdd BLAST17
Transmembranei152 – 165HelicalUniRule annotationAdd BLAST14
Transmembranei207 – 227HelicalUniRule annotationAdd BLAST21
Transmembranei278 – 294HelicalUniRule annotationAdd BLAST17

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem II, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemovedBy similarity
ChainiPRO_00000905002 – 352Photosystem II D2 proteinAdd BLAST351

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei2N-acetylthreonineBy similarity1
Modified residuei2PhosphothreonineBy similarity1

Post-translational modificationi

Phosphorylated in vitro (PubMed:1885590).1 Publication

Keywords - PTMi

Acetylation, Phosphoprotein

Proteomic databases

PaxDbiP06007
PRIDEiP06007

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.UniRule annotation1 Publication

Protein-protein interaction databases

STRINGi3055.DAA00964

Structurei

3D structure databases

ProteinModelPortaliP06007
SMRiP06007
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the reaction center PufL/M/PsbA/D family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG410IFBF Eukaryota
ENOG410XRUT LUCA
InParanoidiP06007
KOiK02706

Family and domain databases

CDDicd09288 Photosystem-II_D2, 1 hit
Gene3Di1.20.85.10, 1 hit
HAMAPiMF_01383 PSII_PsbD_D2, 1 hit
InterProiView protein in InterPro
IPR036854 Photo_II_D1/D2_sf
IPR000484 Photo_RC_L/M
IPR005868 PSII_PsbD/D2
PANTHERiPTHR33149 PTHR33149, 1 hit
PfamiView protein in Pfam
PF00124 Photo_RC, 1 hit
PRINTSiPR00256 REACTNCENTRE
SUPFAMiSSF81483 SSF81483, 1 hit
TIGRFAMsiTIGR01152 psbD, 1 hit
PROSITEiView protein in PROSITE
PS00244 REACTION_CENTER, 1 hit

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P06007-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTIAIGTYQE KRTWFDDADD WLRQDRFVFV GWSGLLLFPC AYFALGGWLT
60 70 80 90 100
GTTFVTSWYT HGLATSYLEG CNFLTAAVST PANSMAHSLL FVWGPEAQGD
110 120 130 140 150
FTRWCQLGGL WAFVALHGAF GLIGFMLRQF EIARSVNLRP YNAIAFSAPI
160 170 180 190 200
AVFVSVFLIY PLGQSGWFFA PSFGVAAIFR FILFFQGFHN WTLNPFHMMG
210 220 230 240 250
VAGVLGAALL CAIHGATVEN TLFEDGDGAN TFRAFNPTQA EETYSMVTAN
260 270 280 290 300
RFWSQIFGVA FSNKRWLHFF MLLVPVTGLW MSAIGVVGLA LNLRAYDFVS
310 320 330 340 350
QEIRAAEDPE FETFYTKNIL LNEGIRAWMA AQDQPHERLV FPEEVLPRGN

AL
Length:352
Mass (Da):39,447
Last modified:August 13, 1987 - v1
Checksum:i81046BC2D36A2C61
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X04147 Genomic DNA Translation: CAA27766.1
FJ423446 Genomic DNA Translation: ACJ50151.1
BK000554 Genomic DNA Translation: DAA00964.1
PIRiA25466
RefSeqiNP_958420.1, NC_005353.1

Genome annotation databases

EnsemblPlantsiDAA00964; DAA00964; DAA00964
GeneIDi2716961
GrameneiDAA00964; DAA00964; DAA00964
KEGGicre:ChreCp064

Similar proteinsi

Entry informationi

Entry nameiPSBD_CHLRE
AccessioniPrimary (citable) accession number: P06007
Secondary accession number(s): B7U1K4
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 13, 1987
Last sequence update: August 13, 1987
Last modified: March 28, 2018
This is version 135 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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