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2013 ; 69
(Pt 6
): 946-59
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Resolution of structural heterogeneity in dynamic crystallography
#MMPMID23695239
Ren Z
; Chan PW
; Moffat K
; Pai EF
; Royer WE Jr
; ?rajer V
; Yang X
Acta Crystallogr D Biol Crystallogr
2013[Jun]; 69
(Pt 6
): 946-59
PMID23695239
show ga
Dynamic behavior of proteins is critical to their function. X-ray
crystallography, a powerful yet mostly static technique, faces inherent
challenges in acquiring dynamic information despite decades of effort. Dynamic
`structural changes' are often indirectly inferred from `structural differences'
by comparing related static structures. In contrast, the direct observation of
dynamic structural changes requires the initiation of a biochemical reaction or
process in a crystal. Both the direct and the indirect approaches share a common
challenge in analysis: how to interpret the structural heterogeneity intrinsic to
all dynamic processes. This paper presents a real-space approach to this
challenge, in which a suite of analytical methods and tools to identify and
refine the mixed structural species present in multiple crystallographic data
sets have been developed. These methods have been applied to representative
scenarios in dynamic crystallography, and reveal structural information that is
otherwise difficult to interpret or inaccessible using conventional methods.