Rab geranylgeranyltransferase

Crystallographic structure of rat RabGGTase (alpha subunit = green, beta subunit = slate blue, calcium ions are shown as green balls, zinc ion as a blue ball).[1]

Rab geranylgeranyltransferase also known as geranylgeranyltransferase II is one of the three prenyltransferases. It transfers (usually) two geranylgeranyl groups to the cystein(s) at the C-terminus of Rab proteins.

The C-terminus of Rab proteins varies in length and sequence and is referred to as hypervariable. Thus Rab proteins do not have a consensus sequence, such as the CAAX box, which the Rab geranylgeranyltransferase can recognise. Instead Rab proteins are bound by the Rab escort protein (REP) over a more conserved region of the Rab protein and then presented to the Rab geranylgeranyltransferase.

单词	Rab geranylgeranyltransferase
释义	Rab geranylgeranyltransferase 英语百科 Rab geranylgeranyltransferase Rab geranylgeranyltransferase also known as geranylgeranyltransferase II is one of the three prenyltransferases. It transfers (usually) two geranylgeranyl groups to the cystein(s) at the C-terminus of Rab proteins. The C-terminus of Rab proteins varies in length and sequence and is referred to as hypervariable. Thus Rab proteins do not have a consensus sequence, such as the CAAX box, which the Rab geranylgeranyltransferase can recognise. Instead Rab proteins are bound by the Rab escort protein (REP) over a more conserved region of the Rab protein and then presented to the Rab geranylgeranyltransferase.
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