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PreprintCited by 1Genomics and Rare DiseasesProtein Structure and DynamicsEnzyme Structure and Function

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Molecular Origins of the Mendelian Rare Diseases Reviewed by Orpha.net: A Structural Bioinformatics Investigation

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Visibelli, Anna, Finetti, Rebecca, Niccolai, Neri, Spiga, Ottavia, Santucci, Annalisa·2024·International Journal of Molecular Sciences
DOI 10.20944/preprints202404.0156.v1PMC PMC11241713

Preprint — published as 10.3390/ijms25136953 · Paper page

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Abstract

The study of rare diseases is important not only for the individuals affected but also for the advancement of medical knowledge and a deeper understanding of human biology and genetics. The wide repertoire of structural information now available from reliable and accurate prediction methods provides the opportunity to investigate the molecular origins of most of the rare diseases reviewed in the Orpha.net database. Thus, it has been possible to analyze the topology of the missense mutations found in the 2,535 proteins involved in Mendelian rare diseases (MRD), which form the database for our structural bioinformatics study. The amino acid substitutions responsible for MRD show different mutation site distributions at different three-dimensional protein depths. We then predicted the depth-dependent effects of mutations for the 20,248 pathogenic variants that are present in our database. The results of this structural bioinformatics investigation are relevant, as they provide additional clues to mitigate the damage caused by MRD.

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Crossref · 10.20944/preprints202404.0156.v1

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Figures

Figure 1 The Orphanetta workflow.
Figure 1 The Orphanetta workflow.CC BY · PubMed Central
Figure 2 Amino acid distributions of missense pathogenic variants reviewed by Opha.net dataset. Rows describe how each of the natural amino acids has been replaced by column residues. Colors refer to the number of codon nucleotides involved in mutations: green, yellow, and red indicate, respectively, one-, two-, and three-nucleotide changes.
Figure 2 Amino acid distributions of missense pathogenic variants reviewed by Opha.net dataset. Rows describe how each of the natural amino acids has been replaced by column residues. Colors refer to the number of codon nucleotides involved in mutations: green, yellow, and red indicate, respectively, one-, two-, and three-nucleotide changes.CC BY · PubMed Central
Figure 3 The sterical distribution of mutation sites in MRD proteins of our dataset. Structural data are clustered according to the POPS algorithm [4], and the Q(SASA) parameter categorizes the 20.248 mutation sites as follows: (i) fully buried < 0.15; (ii) internal > 0.15 and <0.24; (iii) intermediate > 0.24 and <0.60; (iv) external > 0.60 and <0.80; and (v) fully solvent-exposed > 0.8.
Figure 3 The sterical distribution of mutation sites in MRD proteins of our dataset. Structural data are clustered according to the POPS algorithm [4], and the Q(SASA) parameter categorizes the 20.248 mutation sites as follows: (i) fully buried < 0.15; (ii) internal > 0.15 and <0.24; (iii) intermediate > 0.24 and <0.60; (iv) external > 0.60 and <0.80; and (v) fully solvent-exposed > 0.8.CC BY · PubMed Central
Figure 4 Profile of amino acid replacements in the structurally defined proteins that are responsible for MRD. Histograms refer to percent of amino acid variations in the fully buried and fully exposed regions, respectively, in black and grey colors.
Figure 4 Profile of amino acid replacements in the structurally defined proteins that are responsible for MRD. Histograms refer to percent of amino acid variations in the fully buried and fully exposed regions, respectively, in black and grey colors.CC BY · PubMed Central
Figure 5 Amino acid replacement matrices of fully buried (a) and fully exposed (b) pathogenic variants. As in Figure 3, rows describe how each of the natural amino acids has been replaced by column residues.
Figure 5 Amino acid replacement matrices of fully buried (a) and fully exposed (b) pathogenic variants. As in Figure 3, rows describe how each of the natural amino acids has been replaced by column residues.CC BY · PubMed Central

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Metadata

Authors
Visibelli, A., Finetti, R., Niccolai, N., Spiga, O., & Santucci, A.
Affiliations
University of Siena (IT)
Corresponding author
Niccolai, Neri
ORCID
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2024-04-02
Volume
25
Issue
13
Pages
6953-6953
ISSN
1422-0067 (ISSN-L)
DOI
10.20944/preprints202404.0156.v1
PMC
PMC11241713
OpenAlex
W4400092293
Cited by
1
References
1
Citations by year
2025: 1
FWCI
0.27
Type
journal article
Language
en
Open access
Licence
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • Preprints.org (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Use Siena air (University of Siena) (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
Keywords
protein structure, amino acid substitutions, structural bioinformatics
MeSH terms
Humans, Models, Molecular, Protein Conformation, Proteins, Computational Biology, Amino Acid Substitution, Mutation, Missense, Databases, Genetic, Rare Diseases

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