Electronic Journal of Statistics

On geometric probability distributions on the torus with applications to molecular biology

Alessandro Selvitella

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Abstract

In this paper, we study a family of probability distributions, alternative to the von Mises family, called Inverse Stereographic Normal Distributions. These distributions are counterparts of the Gaussian Distribution on $\mathbb{S}^{1}$ (univariate) and $\mathbb{T}^{n}$ (multivariate). We discuss some key properties of the models, such as unimodality and closure with respect to marginalizing and conditioning. We compare this family of distributions to the von Mises’ family and the Wrapped Normal Distribution. Then, we discuss some inferential problems, introduce a notion of moments which is natural for inverse stereographic distributions and revisit a version of the CLT in this context. We construct point estimators, confidence intervals and hypothesis tests and discuss briefly sampling methods. Finally, we conclude with some applications to molecular biology and some illustrative examples. This study is motivated by the Protein Folding Problem and by the fact that a large number of proteins involved in the DNA-metabolism assume a toroidal shape with some amorphous regions.

Article information

Source
Electron. J. Statist., Volume 13, Number 2 (2019), 2717-2763.

Dates
Received: June 2017
First available in Project Euclid: 21 August 2019

Permanent link to this document
https://projecteuclid.org/euclid.ejs/1566353061

Digital Object Identifier
doi:10.1214/19-EJS1579

Subjects
Primary: 62E15: Exact distribution theory 62H10: Distribution of statistics 62H11: Directional data; spatial statistics
Secondary: 62E10: Characterization and structure theory 62E20: Asymptotic distribution theory 62F03: Hypothesis testing 62F10: Point estimation 62F12: Asymptotic properties of estimators 62H15: Hypothesis testing

Keywords
Distributions on manifolds von Mises distributions inverse stereographic distributions molecular biology protein folding problem DNA-metabolism

Rights
Creative Commons Attribution 4.0 International License.

Citation

Selvitella, Alessandro. On geometric probability distributions on the torus with applications to molecular biology. Electron. J. Statist. 13 (2019), no. 2, 2717--2763. doi:10.1214/19-EJS1579. https://projecteuclid.org/euclid.ejs/1566353061


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