1bhz
From Proteopedia
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LOW TEMPERATURE MIDDLE RESOLUTION STRUCTURE OF HEN EGG WHITE LYSOZYME FROM MASC DATA
Overview
A previous article [Fourme et al. (1995). J. Synchrotron Rad. 2, 36-48], presented the theoretical foundations of MASC, a new contrast-variation, method using multiwavelength anomalous scattering, and reported the first, experimental results. New experiments have been conducted both at the ESRF, (Grenoble, France) and at LURE-DCI (Orsay, France), using cryocooled, crystals of three proteins of known structures and very different, molecular weights. Amplitudes of {GammaT(h)}, the 'normal' structure, factors of the anomalously scattering part of the crystal including the, solvent zone and the ordered anomalous scattering sites (if any), have, been extracted from multiwavelength data. In the very low resolution range, (d >/= 20 A), the agreement between experimental {GammaT(h)} and model, values calculated from the bulk solvent is all the more satisfactory since, the molecular weight of the protein is high. For spacings between 10 and, 20 A, the agreement between experimental {GammaT(h)} and model values is, also satisfactory if one takes into account ordered anomalous scatterer, sites. Such sites have been found in the three cases.
About this Structure
1BHZ is a Single protein structure of sequence from Gallus gallus. Active as Lysozyme, with EC number 3.2.1.17 Full crystallographic information is available from OCA.
Reference
Multiwavelength anomalous solvent contrast (MASC): derivation of envelope structure-factor amplitudes and comparison with model values., Ramin M, Shepard W, Fourme R, Kahn R, Acta Crystallogr D Biol Crystallogr. 1999 Jan;55(Pt 1):157-67. Epub 1999, Jan 1. PMID:10089406
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