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2014 ; 2014
(ä): 921218
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Topography prediction of helical transmembrane proteins by a new modification of
the sliding window method
#MMPMID24900999
Simakova MN
; Simakov NN
Biomed Res Int
2014[]; 2014
(ä): 921218
PMID24900999
show ga
Protein functions are specified by its three-dimensional structure, which is
usually obtained by X-ray crystallography. Due to difficulty of handling membrane
proteins experimentally to date the structure has only been determined for a very
limited part of membrane proteins (<4%). Nevertheless, investigation of structure
and functions of membrane proteins is important for medicine and pharmacology
and, therefore, is of significant interest. Methods of computer modeling based on
the data on the primary protein structure or the symbolic amino acid sequence
have become an actual alternative to the experimental method of X-ray
crystallography for investigating the structure of membrane proteins. Here we
presented the results of the study of 35 transmembrane proteins, mainly GPCRs,
using the novel method of cascade averaging of hydrophobicity function within the
limits of a sliding window. The proposed method allowed revealing 139
transmembrane domains out of 140 (or 99.3%) identified by other methods. Also 236
transmembrane domain boundary positions out of 280 (or 84%) were predicted
correctly by the proposed method with deviation from the predictions made by
other methods that does not exceed the detection error of this method.