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
Replaces: 1LYMSummary for 5LYM
Entry DOI | 10.2210/pdb5lym/pdb |
Descriptor | LYSOZYME, NITRATE ION (3 entities in total) |
Functional Keywords | hydrolase (o-glycosyl) |
Biological source | Gallus gallus (chicken) |
Cellular location | Secreted: P00698 |
Total number of polymer chains | 2 |
Total formula weight | 29034.35 |
Authors | Rao, S.T.,Sundaralingam, M. (deposition date: 1995-07-20, release date: 1995-10-15, Last modification date: 2024-06-05) |
Primary citation | Rao, S.T.,Sundaralingam, M. 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. Acta Crystallogr.,Sect.D, 52:170-175, 1996 Cited by PubMed Abstract: 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. PubMed: 15299739DOI: 10.1107/S0907444995009504 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (1.8 Å) |
Structure validation
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