University of Oulu

Murthy, A. V., Sulu, R. , Koski, M. K., Tu, H. , Anantharajan, J. , Sah‐Teli, S. K., Myllyharju, J. and Wierenga, R. K. (2018), Structural enzymology binding studies of the peptide‐substrate‐binding domain of human collagen prolyl 4‐hydroxylase (type‐II): High affinity peptides have a PxGP sequence motif. Protein Science, 27: 1692-1703. doi:10.1002/pro.3450

Structural enzymology binding studies of the peptide‐substrate‐binding domain of human collagen prolyl 4‐hydroxylase (type‐II) : high affinity peptides have a PxGP sequence motif

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Author: Murthy, Abhinandan V.1; Sulu, Ramita1; Koski, M. Kristian1;
Organizations: 1Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu
2Oulu Center for Cell‐Matrix Research, Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe201902226057
Language: English
Published: John Wiley & Sons, 2018
Publish Date: 2019-08-30
Description:

Abstract

The peptide‐substrate‐binding (PSB) domain of collagen prolyl 4‐hydroxylase (C‐P4H, an α2β2 tetramer) binds proline‐rich procollagen peptides. This helical domain (the middle domain of the α subunit) has an important role concerning the substrate binding properties of C‐P4H, although it is not known how the PSB domain influences the hydroxylation properties of the catalytic domain (the C‐terminal domain of the α subunit). The crystal structures of the PSB domain of the human C‐P4H isoform II (PSB‐II) complexed with and without various short proline‐rich peptides are described. The comparison with the previously determined PSB‐I peptide complex structures shows that the C‐P4H‐I substrate peptide (PPG)3, has at most very weak affinity for PSB‐II, although it binds with high affinity to PSB‐I. The replacement of the middle PPG triplet of (PPG)3 to the nonhydroxylatable PAG, PRG, or PEG triplet, increases greatly the affinity of PSB‐II for these peptides, leading to a deeper mode of binding, as compared to the previously determined PSB‐I peptide complexes. In these PSB‐II complexes, the two peptidyl prolines of its central P(A/R/E)GP region bind in the Pro5 and Pro8 binding pockets of the PSB peptide‐binding groove, and direct hydrogen bonds are formed between the peptide and the side chains of the highly conserved residues Tyr158, Arg223, and Asn227, replacing water mediated interactions in the corresponding PSB‐I complex. These results suggest that PxGP (where x is not a proline) is the common motif of proline‐rich peptide sequences that bind with high affinity to PSB‐II.

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Series: Protein science
ISSN: 0961-8368
ISSN-E: 1469-896X
ISSN-L: 0961-8368
Volume: 27
Issue: 9
Pages: 1692 - 1703
DOI: 10.1002/pro.3450
OADOI: https://oadoi.org/10.1002/pro.3450
Type of Publication: A1 Journal article – refereed
Field of Science: 1182 Biochemistry, cell and molecular biology
Subjects:
Funding: Grant sponsor: Academy of Finland, Research council for Biosciences and Environment (296498); Grant sponsor: Academy of Finland, Center of Excellence 2012-2017 (251314); Grant sponsor: Sigrid Jusélius Foundation; Grant sponsor: Jane and Aatos Erkko Foundation.
Academy of Finland Grant Number: 296498
251314
Detailed Information: 296498 (Academy of Finland Funding decision)
251314 (Academy of Finland Funding decision)
Copyright information: © 2018 The Protein Society. This is the peer reviewed version of the following article: Murthy, A. V., Sulu, R. , Koski, M. K., Tu, H. , Anantharajan, J. , Sah‐Teli, S. K., Myllyharju, J. and Wierenga, R. K. (2018), Structural enzymology binding studies of the peptide‐substrate‐binding domain of human collagen prolyl 4‐hydroxylase (type‐II): High affinity peptides have a PxGP sequence motif. Protein Science, 27: 1692-1703, which has been published in final form at https://doi.org/10.1002/pro.3450. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.