This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
3pcn
From Proteopedia
|
STRUCTURE OF PROTOCATECHUATE 3,4-DIOXYGENASE COMPLEXED WITH 3,4-DIHYDROXYPHENYLACETATE
Overview
The crystal structure of the anaerobic complex of Pseudomonas putida, protocatechuate 3,4-dioxygenase (3,4-PCD) bound with the alternative, substrate, 3,4-dihydroxyphenylacetate (HPCA), is reported at 2.4 A, resolution and refined to an R factor of 0.17. Formation of the active, site Fe(III).HPCA chelated complex causes the endogenous axial tyrosinate, Tyr447 (147beta), to dissociate from the iron and rotate into an, alternative orientation analogous to that previously observed in the, anaerobic 3,4-PCD.3,4-dihydroxybenzoate complex (3, 4-PCD.PCA) [Orville, A. M., Lipscomb, J. D., & Ohlendorf, D. H. (1997) Biochemistry 36, 10052-10066]. Two orientations of the aromatic ring of HPCA related by an, approximate 180 degrees rotation within the active site are consistent, with the electron ... [(full description)]
About this Structure
3PCN is a [Protein complex] structure of sequences from [Pseudomonas putida] with FE, BME and DHY as [ligands]. Active as [Protocatechuate 3,4-dioxygenase], with EC number [1.13.11.3]. Structure known Active Sites: ACA, ACB, ACC, ACD, ACE, ACF, VEA, VEB, VEC, VED, VEE and VEF. Full crystallographic information is available from [OCA].
Reference
Crystal structure and resonance Raman studies of protocatechuate 3,4-dioxygenase complexed with 3,4-dihydroxyphenylacetate., Elgren TE, Orville AM, Kelly KA, Lipscomb JD, Ohlendorf DH, Que L Jr, Biochemistry. 1997 Sep 23;36(38):11504-13. PMID:9298971
Page seeded by OCA on Tue Oct 30 10:21:38 2007
