×

Network disruptions

We have been experiencing disruptions on our local network which has affected the stability of these web pages. We have been working with IT support team to get this fixed as a matter of urgency and apologise for any inconvenience.

CATH Classification

Domain Context

CATH Clusters

Superfamily 1.10.246.80
Functional Family

Enzyme Information

2.7.7.72
CCA tRNA nucleotidyltransferase.
based on mapping to UniProt Q7SIB1
A tRNA precursor + 2 CTP + ATP = a tRNA with a 3' CCA end + 3 diphosphate.
-!- The acylation of all tRNAs with an amino acid occurs at the terminal ribose of a 3' CCA sequence. -!- The CCA sequence is added to the tRNA precursor by stepwise nucleotide addition performed by a single enzyme that is ubiquitous in all living organisms. -!- Although the enzyme has the option of releasing the product after each addition, it prefers to stay bound to the product and proceed with the next addition. -!- Formerly EC 2.7.7.21 and EC 2.7.7.25.

UniProtKB Entries (1)

Q7SIB1
CCA_GEOSE
Geobacillus stearothermophilus
CCA-adding enzyme

PDB Structure

PDB 1MIY
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Crystal structures of the Bacillus stearothermophilus CCA-adding enzyme and its complexes with ATP or CTP
Li, F., Xiong, Y., Wang, J., Cho, H.D., Tomita, K., Weiner, A.M., Steitz, T.A.
Cell(Cambridge,Mass.)
CATH-Gene3D is a Global Biodata Core Resource Learn more...