Journal Article

FZJ-2014-04030

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Structure and Dynamics of a Compact State of a Multidomain Protein, the Mercuric Ion Reductase

Hong, L. (Corresponding Author) ; Sharp, M. ; Poblete, S.FZJ* ; Biehl, R.FZJ* ; Zamponi, M.FZJ* ; Szekely, N.FZJ* ; Appavou, M.-S.FZJ* ; Winkler, R. G.FZJ* ; Nauss, R. E. ; Johs, A. ; Parks, J. ; Yi, Z. ; Cheng, X.FZJ* ; Liang, L. ; Ohl, M.FZJ* ; Miller, S.FZJ* ; Richter, D.FZJ* ; Gompper, G.FZJ* ; Smith, J.

2014
Rockefeller Univ. Press New York, NY

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Please use a persistent id in citations: doi:10.1016/j.bpj.2014.06.013

Abstract: The functional efficacy of colocalized, linked protein domains is dependent on linker flexibility and system compaction. However, the detailed characterization of these properties in aqueous solution presents an enduring challenge. Here, we employ a novel, to our knowledge, combination of complementary techniques, including small-angle neutron scattering, neutron spin-echo spectroscopy, and all-atom molecular dynamics and coarse-grained simulation, to identify and characterize in detail the structure and dynamics of a compact form of mercuric ion reductase (MerA), an enzyme central to bacterial mercury resistance. MerA possesses metallochaperone-like N-terminal domains (NmerA) tethered to its catalytic core domain by linkers. The NmerA domains are found to interact principally through electrostatic interactions with the core, leashed by the linkers so as to subdiffuse on the surface over an area close to the core C-terminal Hg(II)-binding cysteines. How this compact, dynamical arrangement may facilitate delivery of Hg(II) from NmerA to the core domain is discussed.

Keyword(s): Health and Life (1st) ; Health and Life (1st) ; Soft Matter, Macromolecules, Complex fluids, Biophysics (1st) ; Biology (2nd)

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Contributing Institute(s):

1. Neutronenstreuung (ICS-1)
2. Neutronenstreuung (Neutronenstreuung ; JCNS-1)
3. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
4. Theorie der Weichen Materie und Biophysik (ICS-2)
5. Theorie der Weichen Materie und Biophysik (IAS-2)
6. JCNS-SNS (JCNS-SNS)

Research Program(s):

1. 451 - Soft Matter Composites (POF2-451) (POF2-451)
2. 54G - JCNS (POF2-54G24) (POF2-54G24)

Experiment(s):

1. J-NSE: Neutron spin-echo spectrometer (NL2ao)
2. KWS-1: Small angle scattering diffractometer (NL3b)
3. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2014

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Database coverage:
; BIOSIS Previews ; Current Contents - Life Sciences ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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