Difference between revisions of "Part:BBa K1998004"
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===Biology & Literature===
 
===Biology & Literature===
−
This biobrick contains one gene from the photosystem II complex of <i>Chlamydomonas reinhardtii</i> - psbD. It is driven by a Plac promoter at the beginning of the sequence, with a RBS preceding the gene, and terminator sequence at the 3' end. The psbD gene that comprises this part encodes the D2 protein, which is one of the two proteins that comprise the Photosystem II reaction center core P680 [1, 2]. It has been shown that the psbD gene is highly conserved within <i>C. rienhardtii</i> [3].
+
 
−
<br><br>
+
PsbM encodes a highly hydrophobic protein, psbM, with a single, membrane spanning α-helix located at the monomer-monomer interface of PSII (Ferreira, Iverson, Maghlaoui, Barber, & Iwata, 2004). This proteins acts to stabilise the dimerization of PSII. While not a necessary factor for PSII biosynthesis, its absence weakens the dimer interconnection of the core complex, and may impair PSII repair (Umate et al., 2007). Deletion studies of this gene have shown a 28% decrease in successfully assembled PSII centres (Bentley, Luo, Dilbeck, Burnap, & Eaton-Rye, 2008).
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Mutations in the psbD gene causes the D2 peptide to not be visible when screened perhaps indicating it's instability within the complex [3]. In addition it was found that other proteins are affected by a mutation in the psbD gene due to the lack of accumulation of other PSII proteins. Therefore the role of psbD is to provide stability in the membrane of the complex as well as to regulate the expression of the D1 protein of the complex [3].
+
 
 +
PsbZ, also referred to as ycf9, is a highly conserved gene amongst photosynthetic species, encoding a two transmembrane helix protein, psbZ (Ferreira et al., 2004). PsbZ is found at the interface between PSII and light harvesting complex II (LHCII). (Minagawa & Takahashi, 2004). Deletion studies of psbZ  have resulted in decreased stability of the PSII-LHCII supercomplex, suggesting this protein is involved in anchoring the two complexes (Swiatek et al., 2001).
 +
 
 +
PsbH encodes a low molecular weight PSII subunit, psbH, containing multiple phosphorylation sites (Vener, Harms, Sussman, & Vierstra, 2001). Deletion studies of this gene across multiple species have shown different effects. In Synechocystis sp., a slower growth rate, higher light sensitivity, and impaired electron transport from QA to QB has been observed (Mayes et al., 1993). In addition, the deletion of psbH has been observed to both destabilize the PSII complex, and impair the binding of bicarbonate to the complex (Komenda, Lupínková, & Kopecký, 2002), and in Chlamydomonas reinhardtii, eliminate the formation of the PSII complex, revealing psbH as a vital gene for the synthesis of Photosystem II (Summer, Schmid, Bruns, & Schmidt, 1997).
 +
 
  
  
 
===Protein information===
 
===Protein information===
−
Protein sequence:  
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psbM
−
Mass - 43kDa
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<br>
 +
mass: 3.76kDa
 +
<br>
 +
sequence: MEVNIYGLTATALFIIIPTSFLLILYVKTASTQD
 +
<br><br>
  
−
LEGFTLYASGSYVVWKEVKKQLRSVHIKRNAHGSMTLMTGFVKTVSYSVGQVYYYSLVLTLHVVGLVLLSLLHGIRMVLLLTKVVTSQQLFLHLLTVWLTLFYLFGVQKLKVI
+
psbZ
−
SLVGVNLVVYGHSLLYTVHLVLVSCFVSLKLLVQTYVHTTQLLSQHQLLYSFQYSFTHVNQVGSLHLVSVLLSSVSFYSSKVSTTGHLTHSTWVLLVFVLLYYVLFTVLLLKTH
+
−
YSKTVTVLTHSVHSTLHRLKKHTLWLLLTVSGHKSSVLLSLTNVGFTSSCYFQLVFGVLLVLVLTYVLTTSYHKRFVLLKNPEFETFYTKKHSSRKVFLAWKGCFRTNHTKRL
+
−
VFSKKIYHRGKPSYITNKRRLAIPGKKRARGSHPRALFFQKX
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<br>
 
<br>
 +
mass: 4.56kDa
 +
<br>
 +
sequence: MVGVPVVFATPNGWTDNKGAVFSGLSLWLLLVFVVGILNSFVV
 +
<br><br>
  
−
===References===
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psbH
−
[1] Kim M, Christopher DA, Mullet JE. ADP-Dependent Phosphorylation Regulates Association of a DNA-Binding Complex with the Barley Chloroplast psbDBlue-Light-Responsive Promoter. Plant physiology. 1999 Feb 1;119(2):663-70.
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<br>
 
<br>
−
[2] Rasmussen OF, Bookjans G, Stummann BM, Henningsen KW. Localization and nucleotide sequence of the gene for the membrane polypeptide D2 from pea chloroplast DNA. Plant molecular biology. 1984 Jul 1;3(4):191-9.
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mass: 6.02kDa
 
<br>
 
<br>
−
[3] Erickson JM, Rahire M, Malnoë P, Girard-Bascou J, Pierre Y, Bennoun P, Rochaix JD. Lack of the D2 protein in a Chlamydomonas reinhardtii psbD mutant affects photosystem II stability and D1 expression. The EMBO journal. 1986 Aug;5(8):1745.
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sequence: MSEAGKVLPGWGTTVLMAVFILLFAAFLLIILEIYNSSLILDDVSMSWETLAKVS
 +
<br><br>
 +
 
 +
psbW
 
<br>
 
<br>
 +
mass: 9.2kDa
 +
<br>
 +
sequence: MATTVRSEVAKKVAMLSTLPATLAAHPAFALVDERMNGDGTGRPFGVNDPVLGWVLLGVFGTMWAIWFIGQKDLGDFEDADDGLKL
 +
<br><br>
 +
 +
psbK
 +
<br>
 +
mass: 5.0kDa
 +
<br>
 +
sequence: MTTLALVLAKLPEAYAPFAPIVDVLPVIPVFFILLAFVWQAAVSFR
 +
<br><br>
 +
 +
===References===
 +
[1]
 +
 +
[2]
 +
 +
[3]
 +
 +
[4]
 +
 +
[5]

Revision as of 04:20, 18 October 2016


psbMZHWK

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal NgoMIV site found at 570
  • 1000
    COMPATIBLE WITH RFC[1000]


Overview

This part is composed of the psbM, psbZ, psbH, psbW and psbK genes. The psbM protein subunit is positioned at the monomer-monomer interface. The psbZ protein controls the interaction of Photosystem II cores with the light-harvesting antenna. The psbH protein is required for stability and assembly of the photosystem II complex. The psbW protein stabilizes dimeric photosytem II. The psbK protein is also required for stability and assembly of Photosystem II.
These parts make up one of the operons in our PSII pathway.

PhotosystemIISynthesis

Biology & Literature

PsbM encodes a highly hydrophobic protein, psbM, with a single, membrane spanning α-helix located at the monomer-monomer interface of PSII (Ferreira, Iverson, Maghlaoui, Barber, & Iwata, 2004). This proteins acts to stabilise the dimerization of PSII. While not a necessary factor for PSII biosynthesis, its absence weakens the dimer interconnection of the core complex, and may impair PSII repair (Umate et al., 2007). Deletion studies of this gene have shown a 28% decrease in successfully assembled PSII centres (Bentley, Luo, Dilbeck, Burnap, & Eaton-Rye, 2008).

PsbZ, also referred to as ycf9, is a highly conserved gene amongst photosynthetic species, encoding a two transmembrane helix protein, psbZ (Ferreira et al., 2004). PsbZ is found at the interface between PSII and light harvesting complex II (LHCII). (Minagawa & Takahashi, 2004). Deletion studies of psbZ have resulted in decreased stability of the PSII-LHCII supercomplex, suggesting this protein is involved in anchoring the two complexes (Swiatek et al., 2001).

PsbH encodes a low molecular weight PSII subunit, psbH, containing multiple phosphorylation sites (Vener, Harms, Sussman, & Vierstra, 2001). Deletion studies of this gene across multiple species have shown different effects. In Synechocystis sp., a slower growth rate, higher light sensitivity, and impaired electron transport from QA to QB has been observed (Mayes et al., 1993). In addition, the deletion of psbH has been observed to both destabilize the PSII complex, and impair the binding of bicarbonate to the complex (Komenda, Lupínková, & Kopecký, 2002), and in Chlamydomonas reinhardtii, eliminate the formation of the PSII complex, revealing psbH as a vital gene for the synthesis of Photosystem II (Summer, Schmid, Bruns, & Schmidt, 1997).


Protein information

psbM
mass: 3.76kDa
sequence: MEVNIYGLTATALFIIIPTSFLLILYVKTASTQD

psbZ
mass: 4.56kDa
sequence: MVGVPVVFATPNGWTDNKGAVFSGLSLWLLLVFVVGILNSFVV

psbH
mass: 6.02kDa
sequence: MSEAGKVLPGWGTTVLMAVFILLFAAFLLIILEIYNSSLILDDVSMSWETLAKVS

psbW
mass: 9.2kDa
sequence: MATTVRSEVAKKVAMLSTLPATLAAHPAFALVDERMNGDGTGRPFGVNDPVLGWVLLGVFGTMWAIWFIGQKDLGDFEDADDGLKL

psbK
mass: 5.0kDa
sequence: MTTLALVLAKLPEAYAPFAPIVDVLPVIPVFFILLAFVWQAAVSFR

References

[1]

[2]

[3]

[4]

[5]