Characterisation of a DNA ligase from an Antarctic metagenomic library
>Magister Scientiae - MSc A metagenomic gene library prepared from soil found beneath a mummified seal carcass in the Miers Valley, Antarctica, suggests an environment rich in uncharacterised biodiversity including enzymes with possible application to industrial processes. A sequence based gene m...
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ftunivwesterncap:oai:etd.uwc.ac.za:11394/4003 2023-05-15T14:02:11+02:00 Characterisation of a DNA ligase from an Antarctic metagenomic library Booysen, Dean Cowan, D. A 2011 http://hdl.handle.net/11394/4003 en eng University of the Western Cape http://hdl.handle.net/11394/4003 University of the Western Cape Metagenomic DNA sequence based screening NAD+-dependent DNA ligase ligase Antarctica bioinformatics Thesis 2011 ftunivwesterncap 2021-06-17T16:09:53Z >Magister Scientiae - MSc A metagenomic gene library prepared from soil found beneath a mummified seal carcass in the Miers Valley, Antarctica, suggests an environment rich in uncharacterised biodiversity including enzymes with possible application to industrial processes. A sequence based gene mining investigation was performed on a clone, which archives a metagenomic sequence from this environment. The sequence was annotated using de novo bioinformatics and molecular biology techniques. A predicted NAD+-dependent DNA ligase, ligDB1 was selected for further characterisation. LigDB1 encodes a gene product that contains all the sequence features of a functional ligase. The protein was overexpressed in a heterologous E. coli host and purified to homogeneity. LigDB1 did not exhibit nick sealing activity, but was able to perform AMP-dependent DNA relaxation in the presence of high concentrations of enzyme. DNA modifying enzymes from cold environments perform optimally at low temperatures and may be of use as molecular tools in biotechnology. Complete characterisation of this enzyme is subject to further investigations Thesis Antarc* Antarctic Antarctica University of the Western Cape: Electronic Thesis and Dissertation Library Antarctic Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Miers Valley ENVELOPE(164.200,164.200,-78.100,-78.100) |
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Open Polar |
collection |
University of the Western Cape: Electronic Thesis and Dissertation Library |
op_collection_id |
ftunivwesterncap |
language |
English |
topic |
Metagenomic DNA sequence based screening NAD+-dependent DNA ligase ligase Antarctica bioinformatics |
spellingShingle |
Metagenomic DNA sequence based screening NAD+-dependent DNA ligase ligase Antarctica bioinformatics Booysen, Dean Characterisation of a DNA ligase from an Antarctic metagenomic library |
topic_facet |
Metagenomic DNA sequence based screening NAD+-dependent DNA ligase ligase Antarctica bioinformatics |
description |
>Magister Scientiae - MSc A metagenomic gene library prepared from soil found beneath a mummified seal carcass in the Miers Valley, Antarctica, suggests an environment rich in uncharacterised biodiversity including enzymes with possible application to industrial processes. A sequence based gene mining investigation was performed on a clone, which archives a metagenomic sequence from this environment. The sequence was annotated using de novo bioinformatics and molecular biology techniques. A predicted NAD+-dependent DNA ligase, ligDB1 was selected for further characterisation. LigDB1 encodes a gene product that contains all the sequence features of a functional ligase. The protein was overexpressed in a heterologous E. coli host and purified to homogeneity. LigDB1 did not exhibit nick sealing activity, but was able to perform AMP-dependent DNA relaxation in the presence of high concentrations of enzyme. DNA modifying enzymes from cold environments perform optimally at low temperatures and may be of use as molecular tools in biotechnology. Complete characterisation of this enzyme is subject to further investigations |
author2 |
Cowan, D. A |
format |
Thesis |
author |
Booysen, Dean |
author_facet |
Booysen, Dean |
author_sort |
Booysen, Dean |
title |
Characterisation of a DNA ligase from an Antarctic metagenomic library |
title_short |
Characterisation of a DNA ligase from an Antarctic metagenomic library |
title_full |
Characterisation of a DNA ligase from an Antarctic metagenomic library |
title_fullStr |
Characterisation of a DNA ligase from an Antarctic metagenomic library |
title_full_unstemmed |
Characterisation of a DNA ligase from an Antarctic metagenomic library |
title_sort |
characterisation of a dna ligase from an antarctic metagenomic library |
publisher |
University of the Western Cape |
publishDate |
2011 |
url |
http://hdl.handle.net/11394/4003 |
long_lat |
ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(164.200,164.200,-78.100,-78.100) |
geographic |
Antarctic Miers Miers Valley |
geographic_facet |
Antarctic Miers Miers Valley |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://hdl.handle.net/11394/4003 |
op_rights |
University of the Western Cape |
_version_ |
1766272299767431168 |