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MetaCyc Polypeptide: Cytochrome b6f complex subunit 4

Gene: petD Accession Number: CHRECP002 (MetaCyc)

Synonyms: 17 kDa polypeptide

Species: Chlamydomonas reinhardtii

Component of:
Cyt b6f monomer
Cyt b6f complex (summary available)

Summary:
PetD is one of the four large subunits of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI).

Citations: [Buschlen91, Yu91, Sakamoto93, Maul02, Stroebel03, Kramzar06, Pierre95]

Locations: chloroplast, thylakoid membrane

Map Position: [6,382 -> 6,864]

Molecular Weight of Polypeptide: 17.44 kD (from nucleotide sequence)

Unification Links: Entrez-gene:2717021 , Pride:P23230 , Protein Model Portal:P23230 , RefSeq:NP_958359.1 , SMR:P23230 , UniProt:P23230

Relationship Links: InterPro:IN-FAMILY:IPR005798 , InterPro:IN-FAMILY:IPR005870 , Panther:IN-FAMILY:PTHR19271:SF0 , PDB:Structure:1Q90 , Pfam:IN-FAMILY:PF00032 , Prosite:IN-FAMILY:PS51003 , RefSeq:PART-OF:NC_005353.1

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

GO Terms:

Cellular Component: GO:0009507 - chloroplast
GO:0042651 - thylakoid membrane

MultiFun Terms: metabolism energy production/transport

Credits:
Created 12-Jan-2010 by May P , MPI-MP
Revised 04-May-2011 by Weerasinghe D


Subunit of: Cyt b6f monomer

Species: Chlamydomonas reinhardtii

Subunit composition of Cyt b6f monomer = [PetC][PetM][PetN][PetL][PetG][PetD][PetB][PetA]
         Cytochrome b6f complex iron-sulfur subunit = PetC (summary available)
         Cytochrome b6f complex subunit 7 = PetM (summary available)
         Cytochrome b6f complex subunit 8 = PetN (summary available)
         Cytochrome b6f complex subunit 6 = PetL (summary available)
         Cytochrome b6f complex subunit 5 = PetG (summary available)
         Cytochrome b6f complex subunit 4 = PetD (summary available)
         Cytochrome b6 = PetB (summary available)
         apocytochrome f = PetA (summary available)

Component of: Cyt b6f complex (summary available)

Locations: chloroplast, thylakoid membrane

GO Terms:

Cellular Component: GO:0009507 - chloroplast
GO:0042651 - thylakoid membrane

Credits:
Created 12-Jan-2010 by May P , MPI-MP


Subunit of: Cyt b6f complex

Species: Chlamydomonas reinhardtii

Subunit composition of Cyt b6f complex = [(PetC)(PetM)(PetN)(PetL)(PetG)(PetD)(PetB)(PetA)]2
         Cyt b6f monomer = (PetC)(PetM)(PetN)(PetL)(PetG)(PetD)(PetB)(PetA)
                 Cytochrome b6f complex iron-sulfur subunit = PetC (summary available)
                 Cytochrome b6f complex subunit 7 = PetM (summary available)
                 Cytochrome b6f complex subunit 8 = PetN (summary available)
                 Cytochrome b6f complex subunit 6 = PetL (summary available)
                 Cytochrome b6f complex subunit 5 = PetG (summary available)
                 Cytochrome b6f complex subunit 4 = PetD (summary available)
                 Cytochrome b6 = PetB (summary available)
                 apocytochrome f = PetA (summary available)

Summary:
Cytochrome b6f is a plastohydroquinone:plastocyanin oxidoreductase present in chloroplasts and plays a major role in the photosynthetic electron transport chain [Kuras07]. It contributes to the proton motive force via the Q-cycle [Malnoe11]. The Q-cycle is a chemic process for proton translocation from the chloroplast stroma into the lumen across the thylakoid membrane [Allen04]. Specifically it couples electron transfer with proton translocation to generate a transmembrane electrochemical H+ gradient [Stroebel03]. X-ray structure of cytochrome b6f has revealed the presence of an atypical heme [deLacroix09]. Furthermore, there is biochemical evidence to suggest that the cytochrome b6f complex contains within its folds a chlorophyll and β carotene molecule, though the function of these two pigments is not known [Pierre97][Zhang99].

Citations: [Catherine09, Baniulis]

Credits:
Created 12-Jan-2010 by May P , MPI-MP
Revised 19-May-2011 by Weerasinghe D


Enzymatic reaction of: plastoquinol-plastocyanin reductase (Cyt b6f complex)

EC Number: 1.10.9.1

Transport reaction diagram for plastoquinol-plastocyanin reductase

In Pathways: hydrogen production VIII , photosynthesis light reactions

Citations: [Baniulis]


References

Allen04: Allen JF (2004). "Cytochrome b6f: structure for signalling and vectorial metabolism." Trends Plant Sci 9(3);130-7. PMID: 15003236

Baniulis: Baniulis D, Yamashita E, Zhang H, Hasan SS, Cramer WA "Structure-function of the cytochrome b6f complex." Photochem Photobiol 84(6);1349-58. PMID: 19067956

Buschlen91: Buschlen S, Choquet Y, Kuras R, Wollman FA (1991). "Nucleotide sequences of the continuous and separated petA, petB and petD chloroplast genes in Chlamydomonas reinhardtii." FEBS Lett 284(2);257-62. PMID: 2060646

Catherine09: Catherine de Vitry, Richard Kuras (2009). "The Cytochrome b6f Complex." Chapter 17. In: The Chlamydomonas Sourcebook. Second Edition.

deLacroix09: de Lacroix de Lavalette A, Barucq L, Alric J, Rappaport F, Zito F (2009). "Is the redox state of the ci heme of the cytochrome b6f complex dependent on the occupation and structure of the Qi site and vice versa?." J Biol Chem 284(31);20822-9. PMID: 19478086

Hurt81: Hurt E, Hauska G (1981). "A cytochrome f/b6 complex of five polypeptides with plastoquinol-plastocyanin-oxidoreductase activity from spinach chloroplasts." Eur J Biochem 117(3);591-5. PMID: 6269845

Kramzar06: Kramzar LM, Mueller T, Erickson B, Higgs DC (2006). "Regulatory sequences of orthologous petD chloroplast mRNAs are highly specific among Chlamydomonas species." Plant Mol Biol 60(3);405-22. PMID: 16514563

Kuras07: Kuras R, Saint-Marcoux D, Wollman FA, de Vitry C (2007). "A specific c-type cytochrome maturation system is required for oxygenic photosynthesis." Proc Natl Acad Sci U S A 104(23);9906-10. PMID: 17535914

Malnoe11: Malnoe A, Wollman FA, de Vitry C, Rappaport F (2011). "Photosynthetic growth despite a broken Q-cycle." Nat Commun 2;301. PMID: 21556055

Maul02: Maul JE, Lilly JW, Cui L, dePamphilis CW, Miller W, Harris EH, Stern DB (2002). "The Chlamydomonas reinhardtii plastid chromosome: islands of genes in a sea of repeats." Plant Cell 14(11);2659-79. PMID: 12417694

Pierre95: Pierre Y, Breyton C, Kramer D, Popot JL (1995). "Purification and characterization of the cytochrome b6 f complex from Chlamydomonas reinhardtii." J Biol Chem 270(49);29342-9. PMID: 7493968

Pierre97: Pierre Y, Breyton C, Lemoine Y, Robert B, Vernotte C, Popot JL (1997). "On the presence and role of a molecule of chlorophyll a in the cytochrome b6 f complex." J Biol Chem 272(35);21901-8. PMID: 9268323

Sakamoto93: Sakamoto W, Kindle KL, Stern DB (1993). "In vivo analysis of Chlamydomonas chloroplast petD gene expression using stable transformation of beta-glucuronidase translational fusions." Proc Natl Acad Sci U S A 90(2);497-501. PMID: 8421681

Stroebel03: Stroebel D, Choquet Y, Popot JL, Picot D (2003). "An atypical haem in the cytochrome b(6)f complex." Nature 426(6965);413-8. PMID: 14647374

Yu91: Yu W, Spreitzer RJ (1991). "Sequences of trnR-ACG and petD that contain a tRNA-like element within the chloroplast genome of Chlamydomonas reinhardtii." Nucleic Acids Res 19(4);957. PMID: 2017378

Zhang99: Zhang H, Huang D, Cramer WA (1999). "Stoichiometrically bound beta-carotene in the cytochrome b6f complex of oxygenic photosynthesis protects against oxygen damage." J Biol Chem 274(3);1581-7. PMID: 9880536


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
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