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2017 ; 8
(9
): 5909-5917
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Crystallophore: a versatile lanthanide complex for protein crystallography
combining nucleating effects, phasing properties, and luminescence
#MMPMID29619195
Engilberge S
; Riobé F
; Di Pietro S
; Lassalle L
; Coquelle N
; Arnaud CA
; Pitrat D
; Mulatier JC
; Madern D
; Breyton C
; Maury O
; Girard E
Chem Sci
2017[Sep]; 8
(9
): 5909-5917
PMID29619195
show ga
Macromolecular crystallography suffers from two major issues: getting
well-diffracting crystals and solving the phase problem inherent to large
macromolecules. Here, we describe the first example of a lanthanide complex
family named "crystallophore" (Xo4), which contributes to tackling both
bottlenecks. This terbium complex, Tb-Xo4, is an appealing agent for
biocrystallography, combining the exceptional phasing power of the Tb(iii) heavy
atom with powerful nucleating properties, providing ready-to-use crystals for
structure determination. Furthermore, protein/Tb-Xo4 co-crystals can be easily
detected and discriminated from other crystalline by-products using luminescence.
We demonstrate the potential of this additive for the crystallisation and
structure determination of eight proteins, two of whose structures were unknown.