Journal Article FZJ-2015-05813

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Salt-Induced Universal Slowing Down of the Short-Time Self-Diffusion of a Globular Protein in Aqueous Solution

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2015
ACS Washington, DC

The journal of physical chemistry letters 6(13), 2577 - 2582 () [10.1021/acs.jpclett.5b01073]

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Abstract: The short-time self-diffusion D of the globular model protein bovine serum albumin in aqueous (D2O) solutions has been measured comprehensively as a function of the protein and trivalent salt (YCl3) concentration, noted cp and cs, respectively. We observe that D follows a universal master curve D(cs,cp) = D(cs = 0,cp) g(cs/cp), where D(cs = 0,cp) is the diffusion coefficient in the absence of salt and g(cs/cp) is a scalar function solely depending on the ratio of the salt and protein concentration. This observation is consistent with a universal scaling of the bonding probability in a picture of cluster formation of patchy particles. The finding corroborates the predictive power of the description of proteins as colloids with distinct attractive ion-activated surface patches.

Keyword(s): Health and Life (1st) ; Health and Life (1st) ; Soft Condensed Matter (2nd) ; Biology (2nd) ; Chemistry (2nd)

Classification:

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. JCNS-SNS (JCNS-SNS)
Research Program(s):
  1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)
  2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
  3. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)
Experiment(s):
  1. Measurement at external facility

Appears in the scientific report 2015
Database coverage:
Medline ; OpenAccess ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; 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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The record appears in these collections:
Institute Collections > JCNS > JCNS-FRM-II
Document types > Articles > Journal Article
Institute Collections > JCNS > JCNS-SNS
Institute Collections > JCNS > JCNS-1
Institute Collections > IBI > IBI-8
Workflow collections > Public records
ICS > ICS-1
Publications database
Open Access

 Record created 2015-09-23, last modified 2024-06-19