Sequence similarity in structurally dissimilar proteins

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Sequence similarity in structurally dissimilar proteins

It is a central tenet of protein evolution that the threedimensional structure of a protein family is better conserved than the sequences themselves. So structural similarities between related proteins should be detectable over longer evolutionary distances and be most useful for the functional prediction of proteins without closely related homologs. Comparative sequence and structural analysis...

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Transport systems frequently include auxiliary proteins that perform subfunctions within the transporter protein complex. Two such proteins found in Gram-negative bacteria are the Membrane Fusion Proteins (MFPs) and the Outer Membrane Auxiliary (OMA) proteins. We here demonstrate that OMAs present in alpha-proteobacteria (but not in other bacterial types) contain a long alpha-helical region tha...

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Phonological Similarity 1 Dissimilar Items Benefit From Phonological Similarity in Serial Recall: The Dissimilar Immunity Effect Revisited

In short-term serial recall, similar-sounding items are remembered less well than items that do not sound alike. This phonological similarity effect has been observed with lists composed only of similar items, and also with lists that mix together similar and dissimilar items. An additional consistent finding with mixed lists has been an effect we refer to as “dissimilar immunity”. Dissimilar i...

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Identification of Local Conformational Similarity in Structurally Variable Regions of Homologous Proteins Using Protein Blocks

Structure comparison tools can be used to align related protein structures to identify structurally conserved and variable regions and to infer functional and evolutionary relationships. While the conserved regions often superimpose well, the variable regions appear non superimposable. Differences in homologous protein structures are thought to be due to evolutionary plasticity to accommodate d...

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Dissimilar items benefit from phonological similarity in serial recall.

In short-term serial recall, similar sounding items are remembered less well than items that do not sound alike. This phonological similarity effect has been observed with lists composed only of similar items, and also with lists that mix together similar and dissimilar items. An additional consistent finding has been what the authors call dissimilar immunity, the finding that ordered recall of...

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ژورنال

عنوان ژورنال: Current Biology

سال: 2003

ISSN: 0960-9822

DOI: 10.1016/s0960-9822(03)00070-8