At last - the crystal structure of urease

Article Abstract:

Evelyn Jabri et al have determined to a resolution of 2 Angstroms the x-ray crystal structure of urease, which was the first enzyme to be crystallized, in 1926. Urease catalyzes the hydrolysis of urea. The sample was obtained from the bacteria Klebsiella aerogenes.

X-ray crystallography

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Evolutionary chemistry: getting there from here

Article Abstract:

A research study used high-resolution x-ray crystallography to examine the structures of a catalytic antibody before and after its catalytic activity was refined. Details of the study, which provide new insights into the antibody maturation process, are presented.

Cover Story, Chemical evolution, Molecular evolution, Catalytic antibodies

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Lipid-regulated kinases: some common themes at last

Article Abstract:

Recent studies reveal unexpected similarities in the control mechanisms of two classes of kinases: phoinositide 3-kinases and PtdIns. The regulatory themes revealed should apply to most protein kinases and therefore simplify understanding their regulation.

Cellular signal transduction

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