5lym
STUDIES OF MONOCLINIC HEN EGG WHITE LYSOZYME. IV. X-RAY REFINEMENT AT 1.8 ANGSTROM RESOLUTION AND A COMPARISON OF THE VARIABLE REGIONS IN THE POLYMORPHIC FORMS
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| , resolution 1.8Å | |||||||
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| Ligands: | |||||||
| Activity: | Lysozyme, with EC number 3.2.1.17 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
OverviewOverview
Monoclinic crystals of hen egg-white lysozyme (E.C. 3.2.1.17, HEL) grown at low pH in the presence of NaNO(3) belong to space group P2(1) with unit-cell dimensions, a = 28.0, b = 62.5, c = 60.9 A and beta= 90.8 degrees with two molecules in the asymmetric unit. 1.8 A resolution intensity data, collected on a CAD-4 diffractometer, contained 17 524 reflections with F > 3sigma (93% complete). Our earlier preliminary 1.8 A model was refitted and refined using X-PLOR to an R value of 0.189. The deviations in the model from ideal geometry are 0.013 A in bond lengths and 2.8 degrees in bond angles. The r.m.s. deviation in the backbone atoms between the two molecules is 0.42 A. A comparison of HEL in different polymorphic crystal forms reveals that the prominent structural variability among them resides in two exposed regions 45-50 and 65-73 which are also regions of lattice contacts.
About this StructureAbout this Structure
5LYM is a Single protein structure of sequence from Gallus gallus. This structure supersedes the now removed PDB entry 1LYM. Full crystallographic information is available from OCA.
ReferenceReference
Studies of monoclinic hen egg-white lysozyme. IV. X-ray refinement at 1.8 A resolution and a comparison of the variable regions in the polymorphic forms., Rao ST, Sundaralingam M, Acta Crystallogr D Biol Crystallogr. 1996 Jan 1;52(Pt 1):170-5. PMID:15299739
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