Succinyl-CoA synthetase

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Human Thrombin with PPACK inhibitor

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Succinyl-Coa synthetase catalyzes the reversible reaction of succinyl-CoA + ADP + Pi <-> succinate + CoA + ATP.

Structure

Succinyl-CoA synthetase

The B chain consists of . As is true for all of the "trypsin-like" serine proteases, each of the two thrombin domains consists mainly of a 6-stranded, antiparallel beta barrel. The specificity pocket (here filled with the Lys sidechain of the PPACK inhibitor) is in one side of the throat of the domain 2beta barrel, and the activation site is close next to it.



Trypsin BPT1 complex

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Trypsin-BPTI complex

The trypsin backbone is shown in pink and the trypsin inhibitor, BPTI, in yellow (PDB code 2ptc). The residues [Ser195-His57-Asp102-Ser214] are shown in green, the disulfide bond between residues 14-38 is shown in yellow and the Lys 15 sidechain at the specificity site in pink.

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