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Ruberedoxin A (RubA) is a protein conserved across all studied oxygenic photoautotrophs[1].

Structure

As of March 2015 there was no crystal structure of RubA. Investigation of the gene however indicates that it differs from other known rubredoxins in being bound to the thylakoid membrane via a C-terminal transmembrane helix.[2][3][1]

Function

An investigation of Guillardia theta noted that RubA had a similar distribution to Photosystem II (PSII) and immunological experiments indicated the presence of RubA in PSII complexes isolated from Spinacia oleracea.[2] In Synechocystis sp. PCC 6803 and in Arabidopsis thaliana it has been demonstrated that the insertion of an antibiotic cassette into the rubA gene results in a marked decrease in the amount of PSII present,[1] while the same mutation within Chlamydomonas reinhardtii results in a total absence of PSII.[1]

Conversely, another study performed in Synechococcus sp. PCC 7002 indicated that mutation of the rubA gene interfered with iron-sulphur cluster assembly in Photosystem I (PSI), rather than affecting PSII.[3][4]

References

  1. ^ a b c d "A Conserved Rubredoxin Is Necessary for Photosystem II Accumulation in Diverse Oxygenic Photoautotrophs". The Journal of Biological Chemistry. 288: 26688–26696. July 2013. doi:10.1074/jbc.M113.487629. {{cite journal}}: Unknown parameter |Author= ignored (|author= suggested) (help)CS1 maint: unflagged free DOI (link)
  2. ^ a b Wastl, J., Duin, E. C., Iuzzolino, L., Dörner, W., Link. T., Dau, H., Lingelbach, K. and Maier U. G. "Eukaryotically Encoded and Chloroplast-located Rubredoxin Is Associated with Photosystem II". The Journal of Biological Chemistry. 275: 30058–30068. doi:10.1074/jbc.M004629200.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: unflagged free DOI (link)
  3. ^ a b Shen, G., Zhao, J., Reimer, S. K., Antonkine, M. L., Cai, Q., Weiland, S. M., Golbeck, J. H. and Bryant, D. A. "Assembly of Photosystem II: I. Inactivation of The rubA Gene Encoding A Membrane-Associated Rubredoxin In The Cyanobacterium Synechococcus sp. PCC 7002 Causes A Loss of Photosystem I Activity". The Journal of Biological Chemistry. 277: 20343–20354. doi:10.1074/jbc.M201103200.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: unflagged free DOI (link)
  4. ^ Shen, G., Antonkine, M. L., van der Est, A., Vassiliev, I. R., Brettel, K., Bittl, R., Zech, S. G., Zhao, J., Stehlik, D., Bryant, D. A. and Golbeck, J. H. "Assembly of Photosystem I: II. Rubredoxin Is Required for the Assembly of Fx in Synechococcus sp. PCC 7002 As Shown by Optical and EPR Spectroscopy". The Journal of Biological Chemistry. 277: 20355–20366. doi:10.1074/jbc.M201104200.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: unflagged free DOI (link)

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