Relative orientation of close-packed -pleated sheets in proteins
نویسندگان
چکیده
منابع مشابه
Relative orientation of close-packed beta-pleated sheets in proteins.
When beta-pleated sheets pack face to face in proteins, the angle between the strand directions of the two beta-sheets is observed to be near -30 degrees . We propose a simple model for beta-sheet-to-beta-sheet packing in concanavalin A, plastocyanin, gamma-crystallin, superoxide dismutase, prealbumin, and the immunoglobin fragment V(REI). This model shows how the observed relative orientation ...
متن کاملStructure of proteins: Packing of a-helices and pleated sheets
Simple models are presented that describe the rules for almost all the packing that occurs between and among cu-helices and pleated sheets. These packing rules, together with the primary and secondary s tructures , are the major determinants of the three-dimensional s tructure of prote ins . Twenty-six years ago, Pauling and his colleagues (1, 2) presented the a-helix and the parallel and antip...
متن کاملStructure of proteins: Packing of a-helices and pleated sheets
Twenty-six years ago, Pauling and his colleagues (1, 2) presented the a-helix and the parallel and antiparallel pleated sheets as models for the local folding (secondary structure) of the polypeptide chain in proteins. Since then, various physical techniques (principally x-ray crystal structure analysis) have clearly shown that these secondary structures are almost universally present in protei...
متن کاملNew Tetrahedrally Close-Packed Structures
We consider mathematical models of foams and froths, as collections of surfaces which minimize area under volume constraints. Combinatorially, because of Plateau’s rules, a foam is dual to some triangulation of space. We examine the class of foams known as tetrahedrally close-packed (TCP) structures, which includes the one used by Weaire and Phelan in their counterexample to the Kelvin conjectu...
متن کاملPairwise Correlations in Layered Close-Packed Structures
Given a description of the stacking statistics of layered close-packed structures in the form of a hidden Markov model, analytical expressions are developed for the pairwise correlation functions between the layers. These may be calculated analytically as explicit functions of model parameters or the expressions may be used as a fast, accurate and efficient way to obtain numerical values. Sever...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1981
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.78.7.4146