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, S.T., Sundaralingam, M.
(1996) Acta Crystallogr.,Sect.D 52: 170-175
- PubMed: 15299739
- DOI: 10.1107/S0907444995009504
- PubMed Abstract:
- The Structure of the Monoclinic Crystal Form of Hen Egg White Lysozyme at 2.5 Angstroms Resolution. Comparison of a Protein Structure in Several Crystalline Environments
(1978) Thesis --: --
- Studies of Monoclinic Hen Egg White Lysozyme. I. Structure Solution at 4 Angstroms Resolution and Molecular-Packing Comparisons with Tetragonal and Triclinic Lysozymes
Hogle, J.,Rao, S.T.,Mallikarjunan, M.,Beddell, C.,Mcmullan, R.K.,Sundaralingam, M.
(1981) Acta Crystallogr.,Sect.B 37: 591
- X-Ray Refinement Studies on Monoclinic Hel Containing Two Independent Molecules at 1.8 Angstrom Resolution
Yu, C.,Rao, S.T.,Sundaralingam, M.
() TO BE PUBLISHED --: --
- Studies of Monoclinic Hen Egg White Lysozyme. II. The Refinement at 2.5 Angstroms Resolution-Conformational Variability between the Two Independent Molecules
Rao, S.T.,Hogle, J.,Sundaralingam, M.
(1983) Acta Crystallogr.,Sect.C 39: 237
Monoclinic crystals of hen egg-white lysozyme (E.C. 22.214.171.124, 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 asymm ...
Monoclinic crystals of hen egg-white lysozyme (E.C. 126.96.36.199, 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.
Laboratory of Biological Macromolecular Structure, Department of Chemistry, The Ohio State University, Columbus 43210, USA.