Rossmann fold: Difference between revisions
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==Extension of the beta sheet by additional strands== | ==Extension of the beta sheet by additional strands== | ||
[[Image:3-phosphoglycerate_dehydrogenase-2P9E-sheet.png|400px|right|thumb| Fig. 5. 3-phosphoglycerate dehydrogenase ([[2p9e]]) beta sheet in the NAD binding domain. The two beta-strands that form the core of the Rossmann fold are marked in dark-blue color.]] | [[Image:3-phosphoglycerate_dehydrogenase-2P9E-sheet.png|400px|right|thumb| Fig. 5. 3-phosphoglycerate dehydrogenase ([[2p9e]]) beta sheet in the NAD binding domain. The two beta-strands that form the core of the Rossmann fold are marked in dark-blue color.]] | ||
As seen in the above example of ferredoxin reductase the β-sheet that is in the nucleotide domain may have more than two strands. In many (but not all) proteins with βαβ fold, the β-strands may be part of a larger β-sheet with up to seven β-strands. Figure | As seen in the above example of ferredoxin reductase the β-sheet that is in the nucleotide domain may have more than two strands. In many (but not all) proteins with βαβ fold, the β-strands may be part of a larger β-sheet with up to seven β-strands. Figure 5 shows five strands forming a β-sheet in phosphoglycerate dehydrogenase ([[2p9e]]). Note that the segment connecting the second strand to the third is in coiled confirmation and not helical. Whereas the subsequent connections between strands include α-helix segments. | ||
==Evolutionary origin of the βαβ fold == | ==Evolutionary origin of the βαβ fold == | ||
