Journal
ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS
Volume 70, Issue -, Pages 467-469Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2053230X14004014
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The second messenger cAMP is synthesized in mammals by ten differently regulated adenylyl cyclases (AC1-10). These ACs are grouped into nucleotidyl cyclase class III based on homologies in their catalytic domains. The catalytic domain of AC10 is unique, however, in being activated through direct interaction with calcium and bicarbonate. Here, the production, crystallization and X-ray diffraction analysis of the catalytic domain of human AC10 are described as a basis for structural studies of regulator binding sites and mechanisms. The recombinant protein had high specific AC activity, and crystals of AC10 in space group P6(3) diffracted to similar to 2.0 angstrom resolution on a synchrotron beamline. A complete diffraction data set revealed unit-cell parameters a = b = 99.65, c = 98.04 angstrom, indicating one AC10 catalytic domain per asymmetric unit, and confirmed that the obtained crystals are suitable for structure solution and mechanistic studies.
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