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Gaussian process modelling for bicoid mRNA regulation in spatio-temporal Bicoid profile

Gaussian process modelling for bicoid mRNA regulation in spatio-temporal Bicoid profile
Gaussian process modelling for bicoid mRNA regulation in spatio-temporal Bicoid profile
Motivation: Bicoid protein molecules, translated from maternally provided bicoid mRNA, establish a concentration gradient in Drosophila early embryonic development. There is experimental evidence that the synthesis and subsequent destruction of this protein is regulated at source by precise control of the stability of the maternal mRNA. Can we infer the driving function at the source from noisy observations of the spatio-temporal protein profile? We use non-parametric Gaussian process regression for modelling the propagation of Bicoid in the embryo and infer aspects of source regulation as a posterior function. Results: With synthetic data from a 1D diffusion model with a source simulated to model mRNA stability regulation, our results establish that the Gaussian process method can accurately infer the driving function and capture the spatio-temporal dynamics of embryonic Bicoid propagation. On real data from the FlyEx database, too, the reconstructed source function is indicative of stability regulation, but is temporally smoother than what we expected, partly due to the fact that the dataset is only partially observed. To be in line with recent thinking on the subject, we also analyse this model with a spatial gradient of maternal mRNA, rather than being fixed at only the anterior pole.
1367-4803
366-372
Liu, Wei
062dd3e4-39b6-45f5-9e48-583a67055830
Niranjan, Mahesan
5cbaeea8-7288-4b55-a89c-c43d212ddd4f
Liu, Wei
062dd3e4-39b6-45f5-9e48-583a67055830
Niranjan, Mahesan
5cbaeea8-7288-4b55-a89c-c43d212ddd4f

Liu, Wei and Niranjan, Mahesan (2012) Gaussian process modelling for bicoid mRNA regulation in spatio-temporal Bicoid profile. Bioinformatics, 28 (3), 366-372. (doi:10.1093/bioinformatics/btr658).

Record type: Article

Abstract

Motivation: Bicoid protein molecules, translated from maternally provided bicoid mRNA, establish a concentration gradient in Drosophila early embryonic development. There is experimental evidence that the synthesis and subsequent destruction of this protein is regulated at source by precise control of the stability of the maternal mRNA. Can we infer the driving function at the source from noisy observations of the spatio-temporal protein profile? We use non-parametric Gaussian process regression for modelling the propagation of Bicoid in the embryo and infer aspects of source regulation as a posterior function. Results: With synthetic data from a 1D diffusion model with a source simulated to model mRNA stability regulation, our results establish that the Gaussian process method can accurately infer the driving function and capture the spatio-temporal dynamics of embryonic Bicoid propagation. On real data from the FlyEx database, too, the reconstructed source function is indicative of stability regulation, but is temporally smoother than what we expected, partly due to the fact that the dataset is only partially observed. To be in line with recent thinking on the subject, we also analyse this model with a spatial gradient of maternal mRNA, rather than being fixed at only the anterior pole.

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More information

e-pub ahead of print date: 29 November 2011
Published date: 2012
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 273233
URI: http://eprints.soton.ac.uk/id/eprint/273233
ISSN: 1367-4803
PURE UUID: a2e12f65-89d2-4109-981a-a27470c07e54
ORCID for Mahesan Niranjan: ORCID iD orcid.org/0000-0001-7021-140X

Catalogue record

Date deposited: 25 Feb 2012 17:24
Last modified: 14 May 2024 01:40

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Contributors

Author: Wei Liu
Author: Mahesan Niranjan ORCID iD

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