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PDBsum entry 2m10
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References listed in PDB file
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Key reference
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Title
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Kinetic response of a photoperturbed allosteric protein.
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Authors
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B.Buchli,
S.A.Waldauer,
R.Walser,
M.L.Donten,
R.Pfister,
N.Blöchliger,
S.Steiner,
A.Caflisch,
O.Zerbe,
P.Hamm.
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Ref.
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Proc Natl Acad Sci U S A, 2013,
110,
11725-11730.
[DOI no: ]
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PubMed id
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Abstract
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By covalently linking an azobenzene photoswitch across the binding groove of a
PDZ domain, a conformational transition, similar to the one occurring upon
ligand binding to the unmodified domain, can be initiated on a picosecond
timescale by a laser pulse. The protein structures have been characterized in
the two photoswitch states through NMR spectroscopy and the transition between
them through ultrafast IR spectroscopy and molecular dynamics simulations. The
binding groove opens on a 100-ns timescale in a highly nonexponential manner,
and the molecular dynamics simulations suggest that the process is governed by
the rearrangement of the water network on the protein surface. We propose this
rearrangement of the water network to be another possible mechanism of allostery.
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