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2iu4
From Proteopedia
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DIHYDROXYACETONE KINASE OPERON CO-ACTIVATOR DHA-DHAQ
Overview
Dihydroxyacetone (Dha) kinases are a novel family of kinases with, signaling and metabolic functions. Here we report the x-ray structures of, the transcriptional activator DhaS and the coactivator DhaQ and, characterize their function. DhaQ is a paralog of the Dha binding Dha, kinase subunit; DhaS belongs to the family of TetR repressors although, unlike all known members of this family, it is a transcriptional, activator. DhaQ and DhaS form a stable complex that in the presence of Dha, activates transcription of the Lactococcus lactis dha operon. Dha, covalently binds to DhaQ through a hemiaminal bond with a histidine and, thereby induces a conformational change, which is propagated to the, surface via a cantilever-like structure. DhaS binding protects an inverted, repeat whose sequence ... [(full description)]
About this Structure
2IU4 is a [Single protein] structure of sequence from [Lactococcus lactis] with SO4 and HIQ as [ligands]. Active as [[1]], with EC number [2.7.1.2]. Full crystallographic information is available from [OCA].
Reference
Regulation of the Dha operon of Lactococcus lactis: a deviation from the rule followed by the Tetr family of transcription regulators., Christen S, Srinivas A, Bahler P, Zeller A, Pridmore D, Bieniossek C, Baumann U, Erni B, J Biol Chem. 2006 Aug 11;281(32):23129-37. Epub 2006 Jun 7. PMID:16760471
Page seeded by OCA on Mon Oct 29 17:59:29 2007
Categories: Lactococcus lactis | Single protein | Baumann, U. | Christen, S. | Erni, B. | Srinivas, A. | HIQ | SO4 | Co-activator | Dihydroxyacetone | Kinase | Transferase
