| Autor: |
Tiburzy HJ; Lehrstuhl für Biochemie der Pflanzen, Fakultät für Biologie, Ruhr-Universität Bochum, Germany., Berzborn RJ |
| Jazyk: |
angličtina |
| Zdroj: |
Zeitschrift fur Naturforschung. C, Journal of biosciences [Z Naturforsch C J Biosci] 1997 Nov-Dec; Vol. 52 (11-12), pp. 789-98. |
| DOI: |
10.1515/znc-1997-11-1211 |
| Abstrakt: |
Subunit I of chloroplast ATP synthase is reviewed until now to be equivalent to subunit b of Escherichia coli ATP synthase, whereas subunit II is suggested to be an additional subunit in photosynthetic ATP synthases lacking a counterpart in E. coli. After publication of some sequences of subunits II a revision of this assignment is necessary. Based on the analysis of 51 amino acid sequences of b-type subunits concerning similarities in primary structure, isoelectric point and a discovered discontinuous structural feature, our data provide evidence that chloroplast subunit II (subunit b' of photosynthetic eubacteria) and not chloroplast subunit I (subunit b of photosynthetic eubacteria) is the equivalent of subunit b of nonphotosynthetic eubacteria, and therefore does have a counterpart in e.g. E. coli. In consequence, structural features essential for function should be looked for on subunit II (b'). |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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