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The Hansenula polymorpha (strain CBS4732) genome sequencing and analysis.
Massoud Ramezani-Rad1, Cornelis P Hollenberg, Juergen Lauber
1Institute for Microbiology, Heinrich-Heine University Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany. ramezani@uni-duesseldorf.de
FEMS Yeast Research
|November 14, 2003
Summary
The methylotrophic yeast Hansenula polymorpha genome was sequenced, revealing its organization and protein-coding genes. This characterization supports its use as a model organism for studying peroxisomal functions and heterologous gene expression.
Area of Science:
- Microbiology
- Genomics
- Molecular Biology
Background:
- Hansenula polymorpha is a methylotrophic yeast widely used for studying peroxisomal function, methanol metabolism, nitrate assimilation, and thermostability.
- Strain RB11 of H. polymorpha serves as a key platform for heterologous gene expression, highlighting the need for its genomic characterization.
Purpose of the Study:
- To perform a comprehensive characterization of the entire genome of Hansenula polymorpha strain RB11.
- To provide a foundational genomic resource for understanding H. polymorpha's biological processes and applications.
Main Methods:
- Whole-genome sequencing of H. polymorpha RB11.
- Assembly of the sequenced genome into chromosomes and scaffolds.
- Manual annotation of open reading frames (ORFs) and comparison with protein databases.
Main Results:
- The H. polymorpha RB11 genome spans approximately 9.5 Mb, organized into six chromosomes.
- Over 90% of the genome was accurately sequenced and assembled into 48 contigs on eight scaffolds.
- 4767 out of 5933 predicted ORFs showed homology to known proteins, with 1166 ORFs having no significant similarity.
Conclusions:
- The genome sequencing and annotation provide a comprehensive resource for H. polymorpha research.
- The genomic data will facilitate further investigations into peroxisomal function and heterologous gene expression systems.
- The number of ORFs is consistent with other sequenced yeasts of comparable genome size.