| Title |
Structural aspects of the cytochromeb6f complex; structure of the lumen-side domain of cytochromef
|
|---|---|
| Published in |
Journal of Bioenergetics and Biomembranes, February 1994
|
| DOI | 10.1007/bf00763218 |
| Pubmed ID | |
| Authors |
W. A. Cramer, S. E. Martinez, D. Huang, G. -S. Tae, R. M. Everly, J. B. Heymann, R. H. Cheng, T. S. Baker, J. L. Smith |
| Abstract |
The following findings concerning the structure of the cytochrome b6f complex and its component polypeptides, cyt b6, subunit IV and cytochrome f subunit are discussed: (1) Comparison of the amino acid sequences of 13 and 16 cytochrome b6 and subunit IV polypeptides, respectively, led to (a) reconsideration of the helix lengths and probable interface regions, (b) identification of two likely surface-seeking helices in cyt b6 and one in SU IV, and (c) documentation of a high degree of sequence invariance compared to the mitochondrial cytochrome. The extent of identity is particularly high (88% for conserved and pseudoconserved residues) in the segments of cyt b6 predicted to be extrinsic on the n-side of the membrane. (2) The intramembrane attractive forces between trans-membrane helices that normally stabilize the packing of integral membrane proteins are relatively weak. (3) The complex isolated in dimeric form has been visualized, along with isolated monomer, by electron microscopy. The isolated dimer is much more active than the monomer, is the major form of the complex isolated and purified from chloroplasts, and is inferred to be a functional form in the membrane. (4) The isolated cyt b6f complex contains one molecule of chlorophyll a. (5) The structure of the 252 residue lumen-side domain of cytochrome f isolated from turnip chloroplasts has been solved by X-ray diffraction analysis to a resolution of 2.3 A. |
Mendeley readers
The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Canada | 1 | 6% |
| Unknown | 16 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Doctoral Student | 3 | 18% |
| Student > Bachelor | 3 | 18% |
| Professor > Associate Professor | 3 | 18% |
| Researcher | 3 | 18% |
| Student > Master | 2 | 12% |
| Other | 1 | 6% |
| Unknown | 2 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Biochemistry, Genetics and Molecular Biology | 5 | 29% |
| Agricultural and Biological Sciences | 5 | 29% |
| Chemistry | 3 | 18% |
| Mathematics | 2 | 12% |
| Immunology and Microbiology | 1 | 6% |
| Other | 0 | 0% |
| Unknown | 1 | 6% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 27 January 2015.
All research outputs
#7,926,100
of 23,867,274 outputs
Outputs from Journal of Bioenergetics and Biomembranes
#105
of 466 outputs
Outputs of similar age
#14,996
of 73,112 outputs
Outputs of similar age from Journal of Bioenergetics and Biomembranes
#2
of 5 outputs
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So far Altmetric has tracked 466 research outputs from this source. They receive a mean Attention Score of 3.3. This one is in the 39th percentile – i.e., 39% of its peers scored the same or lower than it.
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