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NMR solution structure of SlyD from Escherichia coli: spatial separation of prolyl isomerase and chaperone function

Title data

Weininger, Ulrich ; Haupt, Caroline ; Schweimer, Kristian ; Graubner, Wenke ; Kovermann, Michael ; Brüser, Thomas ; Scholz, Christian ; Schaarschmidt, Peter ; Zoldák, Gabriel ; Schmid, Franz X. ; Balbach, Jochen:
NMR solution structure of SlyD from Escherichia coli: spatial separation of prolyl isomerase and chaperone function.
In: Journal of Molecular Biology. Vol. 387 (27 March 2009) Issue 2 . - pp. 295-305.
ISSN 0022-2836
DOI: https://doi.org/10.1016/j.jmb.2009.01.034

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Abstract in another language

SlyD (sensitive to lysis D) is a putative folding helper from the bacterial cytosol and harbors prolyl isomerase and chaperone activities. We determined the solution NMR structure of a truncated version of SlyD (1-165) from Escherichia coli (SlyD*) that lacks the presumably unstructured C-terminal tail. SlyD* consists of two well-separated domains: the FKBP domain, which harbors the prolyl isomerase activity, and the insert-in-flap (IF) domain, which harbors the chaperone activity. The IF domain is inserted into a loop of the FKBP domain near the prolyl isomerase active site. The NMR structure of SlyD* showed no distinct orientation of the two domains relative to each other. In the FKBP domain, Tyr68 points into the active site, which might explain the lowered intrinsic prolyl isomerase activity and the much lower FK506 binding affinity of the protein compared with archetype human FKBP12 (human FK506 binding protein with 12 kDa). The thermodynamics and kinetics of substrate binding by SlyD* were quantified by fluorescence resonance energy transfer. NMR titration experiments revealed that the IF domain recognizes and binds unfolded or partially folded proteins and peptides. Insulin aggregation is markedly slowed by SlyD* as evidenced by two-dimensional NMR spectroscopy in real time, probably due to SlyD* binding to denatured insulin. The capacity of the IF domain to establish an initial encounter-collision complex, together with the flexible orientation of the two interacting domains, makes SlyD* a very powerful catalyst of protein folding.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PubMed-ID: 19356587
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Professorship Biochemistry - Univ.-Prof. Dr. Franz Xaver Schmid
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Biochemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 23 Apr 2015 08:51
Last Modified: 01 Feb 2016 13:25
URI: https://eref.uni-bayreuth.de/id/eprint/10616