1l3i

From Proteopedia

Jump to: navigation, search

MT0146, THE PRECORRIN-6Y METHYLTRANSFERASE (CBIT) HOMOLOG FROM M. THERMOAUTOTROPHICUM, ADOHCY BINARY COMPLEX

Structural highlights

1l3i is a 6 chain structure with sequence from Methanothermobacter thermautotrophicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.95Å
Ligands:MSE, SAH
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CBIT_METTH Catalyzes the methylation of C-15 in cobalt-precorrin-6B followed by the decarboxylation of C-12 to form cobalt-precorrin-7 (Probable).[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The CbiT and CbiE enzymes participate in the biosynthesis of vitamin B12. They are fused together in some organisms to form a protein called CobL, which catalyzes two methylations and one decarboxylation on a precorrin intermediate. Because CbiE has sequence homology to canonical precorrin methyltransferases, CbiT was hypothesized to catalyze the decarboxylation. We herein present the crystal structure of MT0146, the CbiT homolog from Methanobacterium thermoautotrophicum. The protein shows structural similarity to Rossmann-like S-adenosyl-methionine-dependent methyltransferases, and our 1.9 A cocrystal structure shows that it binds S-adenosyl-methionine in standard geometry near a binding pocket that could accommodate a precorrin substrate. Therefore, MT0146/CbiT probably functions as a precorrin methyltransferase and represents the first enzyme identified with this activity that does not have the canonical precorrin methyltransferase fold.

The crystal structure of MT0146/CbiT suggests that the putative precorrin-8w decarboxylase is a methyltransferase.,Keller JP, Smith PM, Benach J, Christendat D, deTitta GT, Hunt JF Structure. 2002 Nov;10(11):1475-87. PMID:12429089[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Loading citation details..
Citations
9 reviews cite this structure
Many paths to methyltransfer: a chronicle of convergence.
Schubert et al. (2003)
8 more
12 other articles
No citations found

References

  1. ↑ Keller JP, Smith PM, Benach J, Christendat D, deTitta GT, Hunt JF. The crystal structure of MT0146/CbiT suggests that the putative precorrin-8w decarboxylase is a methyltransferase. Structure. 2002 Nov;10(11):1475-87. PMID:12429089
  2. ↑ Keller JP, Smith PM, Benach J, Christendat D, deTitta GT, Hunt JF. The crystal structure of MT0146/CbiT suggests that the putative precorrin-8w decarboxylase is a methyltransferase. Structure. 2002 Nov;10(11):1475-87. PMID:12429089

Contents


PDB ID 1l3i

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://proteopedia.org/wiki/index.php/1l3i"
Personal tools