Bakteriorodopsin
protein
Bakteriorodopsin adalah protein yang digunakan oleh Archaea, terutama oleh Halobacteria, kelas dari Euryarchaeota.[1] Ini bertindak sebagai pompa proton; yaitu, menangkap energi cahaya dan menggunakannya untuk memindahkan proton melintasi membran dari sel.[2] Gradien proton yang dihasilkan selanjutnya diubah menjadi energi kimia.[3]
Galeri
sunting-
Bacteriorhodopsin is a trimer. Red line indicates extracellular side (EC) of the membrane -
![Bacteriorhodopsin single monomer with retinal molecule between 7 vertical alpha helixes (PDB ID: 1X0S[4][5][6]). One more small helix is light blue, beta sheet yellow.](//upload.wikimedia.org/wikipedia/commons/2/21/Bacteriorhodopsin_subunit_1X0S.png)
Bacteriorhodopsin single monomer with retinal molecule between 7 vertical alpha helixes (PDB ID: 1X0S[4][5][6]). One more small helix is light blue, beta sheet yellow. -
![Bacteriorhodopsin trimer with one retinal molecule in each subunit seen from the extracellular side EC (PDB ID: 1X0S [4][5][6]).](//upload.wikimedia.org/wikipedia/commons/c/c4/Bacteriorhodopsin_trimer_1X0S.png)
![Bacteriorhodopsin single monomer with retinal molecule between 7 vertical alpha helixes (PDB ID: 1X0S[4][5][6]). One more small helix is light blue, beta sheet yellow.](/wiki/Berkas:Bacteriorhodopsin_subunit_1X0S_large.gif)
![Bacteriorhodopsin trimer with one retinal molecule in each subunit seen from the extracellular side EC (PDB ID: 1X0S [4][5][6]).](/wiki/Berkas:Bacteriorhodopsin_trimer_1X0S_large.gif)
Literatur
sunting- ^ See the NCBI webpage on Halobacteria
- ^ Voet, Judith G.; Voet, Donald (2004). Biochemistry. New York: J. Wiley & Sons. ISBN 0-471-19350-X.
- ^ name="urlBacteriorhodopsin: Pumping Ions">"Bacteriorhodopsin: Pumping Ions".
- ^ a b Nishikawa, T.; Murakami, M. (2005-03-28). "Crystal structure of the 13-cis isomer of bacteriorhodopsin". RCSB Protein Data Bank (PDB). doi:10.2210/pdb1x0s/pdb. PDB ID: 1X0S. Diakses tanggal 7 October 2012.
- ^ a b Nishikawa, T.; Murakami, M. (2005). "Crystal structure of the 13-cis isomer of bacteriorhodopsin in the dark-adapted state". J.Mol.Biol. Elsevier. 352: 319–328. doi:10.1016/j.jmb.2005.07.021. PMID 16084526. PDB ID: 1X0S. Diakses tanggal 7 October 2012.
- ^ a b Image created with RasTop (Molecular Visualization Software).
Pranala luar
sunting- Bacteriorhodopsin: Molecule of the Month Diarsipkan 2014-10-19 di Wayback Machine., by David Goodsell, RCSB Protein Data Bank
- Orientasi Protein Membran UMich families/superfamily-6 - Calculated spatial positions of bacteriorhodopsin-like proteins in membrane