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Author(s) |
Goyal, V. D.; Yadav, P.; Kumar, A.; Ghosh, B.; Makde, R. D. (HP&SRPD)
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Source |
Acta Crystallographica-F, 2014. Vol. 70: pp. 1521-1525 |
ABSTRACT
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A
bioinformatics-based protein-engineering approach called consensus
design led to the construction of a chimeric triosephosphate isomerase
(TIM) protein called ccTIM (curated consensus TIM) which is as active as
Saccharomyces cerevisiae TIM despite sharing only 58% sequence
identity with it. The aminoacid sequence of this novel protein is as
identical to native sequences from eukaryotes as to those from
prokaryotes and shares some biophysical traits with a molten globular
protein. Solving its crystal structure would help in understanding the
physical implications of its bioinformatics-based sequence. In this
report, the ccTIM protein was successfully crystallized using the
microbatch-under-oil method and a full X-ray diffraction data set was
collected to 2.2 Å resolution using a synchrotron-radiation source. The
crystals belonged to space group C2221, with unit-cell parameters a = 107.97, b= 187.21, c=288.22
Å. Matthews coefficient calculations indicated the presence of six
dimmers in the asymmetric unit, with an approximate solvent content of
46.2%. |
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