Using standard terminology, Li and coauthors called the form of the protein lack

ID: 178227 • Letter: U

Question

Using standard terminology, Li and coauthors called the form of the protein lacking CoA apo-BtrI and the form with CoA holo-BtrI. When holo-BtrI was incubated with glutamine, ATP, and purified BtrJ protein, the holo-BtrI species of Mr 12,153 was replaced with a species of Mr 12,281, corresponding to the thioester of glutamate and holo-BtrI. Based on these data, the authors proposed the following structure for the Mr 12,281 species (-glutamyl-S-BtrI): What other structure(s) is (are) consistent with the data above?

Explanation / Answer

These are the other structures which are consistent with this data :

When the Mr 12,281 species ( -glutamyl-S-BtrI ) was incubated with the purified BtrK proteins, a molecular species of M12,240 was produced.

When the glutamate and the ATP was incubated with the purified Btrl, BtrJ, and BtrK proteins, a molecular species of M12,370 was produced.( Note : BtrJ can use ATP to -glutamylate nucleophilic groups )

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Using standard terminology, Li and coauthors called the form of the protein lack

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