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High-throughput Screening for Protein-based Inheritance in S. cerevisiae

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Comparative genomic analysis of prion genes.

Marko Premzl¹, Vera Gamulin

¹Department of Molecular Biology, Rudjer Boskovic Institute, Zagreb, Croatia. mpremzl@irb.hr

|January 4, 2007

Summary

This study comprehensively analyzed prion protein gene (PRNP) and its homologues across vertebrates, identifying conserved regulatory elements and revealing evolutionary relationships. The findings suggest potential structural compatibility between shado proteins and prion protein folds.

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Area of Science:

Comparative genomics
Evolutionary biology
Molecular genetics

Background:

Understanding human disease genes requires studying their evolutionary conservation.
Comparative genomic analysis of prion protein gene (PRNP) and its homologues (SPRN, PRND, PRNT) in vertebrates is crucial for physiological and pathogenic insights.

Purpose of the Study:

To conduct a comprehensive comparative genomic analysis of PRNP and its homologues across vertebrates.
To identify conserved cis-elements and understand the evolutionary history and potential structural relationships of prion protein family genes.

Main Methods:

Comparative genomic analysis using VISTA with human as the reference sequence.
Annotation of potential cis-elements in conserved regions of PRNP, SPRN, PRND, and PRNT.
Deduction of 42 new protein structures and phylogenetic analysis using neighbor-joining method on 122 protein sequences.

Main Results:

SPRN and PRNP homologues are found in all vertebrates, PRND in tetrapods, and PRNT in primates.
Identified conserved cis-elements including Sp1 sites, splicing enhancers/silencers, and polyadenylation signals in PRNP, SPRN, and PRND.
Phylogenetic analysis revealed four major clusters, indicating evolutionary divergence and potential structural compatibility between shado proteins and prion proteins.

Conclusions:

Conserved genomic elements likely represent functional cis-elements, warranting further functional validation.
The evolutionary analysis provides a framework for understanding the functional diversification of prion protein family genes.