cAMP receptor proteins (CRP or CAP)
I. interacts with DNA through a leucine zipper motif
II. forms dimeric structure binding 2 cAMP molecules
III. bound to cAMP, interacts with DNA upstream of the lac operon operator
IV. forms a bend in DNA to inhibit RNA polymerase binding

Question

Quizplus · Accepted Answer

cAMP receptor proteins (CRP or CAP) form dimeric structures that bind 2 cAMP molecules. When bound to cAMP, CRP interacts with DNA upstream of the lac operon operator, forming a bend in DNA to inhibit RNA polymerase binding.

CAMP Receptor Proteins (CRP or CAP)