Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event
We report the isolation of a cold-adapted bacterium belonging to the genus Janthinobacterium (named AU11), from a water sample collected in Lake Uruguay (King George Island, South Shetlands). AU11 (growth between 4°C and 30°C) produces a single cold-active extracellular protease (ExPAU11), different...
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ftarcticportal:oai:generic.eprints.org:2562 2023-11-12T03:59:42+01:00 Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event Martinez-Rosales, Cecilia Marizcurrena, Juan José Iriarte, Andrés Fullana, Natalia Musto, Héctor Castro-Sowinski, Susana 2015-03 application/pdf http://library.arcticportal.org/2562/ http://library.arcticportal.org/2562/1/A20150111.pdf en eng Polar Research Institute of China - PRIC http://library.arcticportal.org/2562/1/A20150111.pdf Martinez-Rosales, Cecilia and Marizcurrena, Juan José and Iriarte, Andrés and Fullana, Natalia and Musto, Héctor and Castro-Sowinski, Susana (2015) Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event. Advances in Polar Science, 26 (1). pp. 88-95. Cryosphere Article PeerReviewed 2015 ftarcticportal 2023-11-01T23:54:37Z We report the isolation of a cold-adapted bacterium belonging to the genus Janthinobacterium (named AU11), from a water sample collected in Lake Uruguay (King George Island, South Shetlands). AU11 (growth between 4°C and 30°C) produces a single cold-active extracellular protease (ExPAU11), differentially expressed at low temperature. ExPAU11 was identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS) as an alkaline metallo-protease (70% coverage with an extracellular protease of Janthinobacterium sp. PI12), and by protease-inhibitor screening identified as a serine-protease. To the best of our knowledge this is the first experimental evidence of a cold-active extracellular protease produced by Janthinobacterium. Furthermore, we identified a serine-protease gene (named JSP8A) showing 60% identity (98% query coverage) to subtilisin peptidases belonging to the S8 family (S8A subfamily) of many cyanobacteria. A phylogenetic analysis of the JSP8A protease, along with related bacterial protein sequences, confirms that JSP8A clusters with S8A subtilisin sequences from different cyanobacteria, and is clearly separated from S8A bacterial sequences of other phyla (including its own). An analysis of the genomic organization around JSP8A suggests that this protease gene was acquired in an event that duplicated a racemase gene involved in transforming L- to D-amino acids. Our results suggest that AU11 probably acquired this subtilisin-like protease gene by horizontal gene transfer (HGT) from a cyanobacterium. We discuss the relevance of a bacterial protease-HGT in the Antarctic environment in light of this hypothesis. Article in Journal/Newspaper Advances in Polar Science Antarc* Antarctic King George Island Polar Science Polar Science Arctic Portal Library |
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Cryosphere |
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Cryosphere Martinez-Rosales, Cecilia Marizcurrena, Juan José Iriarte, Andrés Fullana, Natalia Musto, Héctor Castro-Sowinski, Susana Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event |
topic_facet |
Cryosphere |
description |
We report the isolation of a cold-adapted bacterium belonging to the genus Janthinobacterium (named AU11), from a water sample collected in Lake Uruguay (King George Island, South Shetlands). AU11 (growth between 4°C and 30°C) produces a single cold-active extracellular protease (ExPAU11), differentially expressed at low temperature. ExPAU11 was identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS) as an alkaline metallo-protease (70% coverage with an extracellular protease of Janthinobacterium sp. PI12), and by protease-inhibitor screening identified as a serine-protease. To the best of our knowledge this is the first experimental evidence of a cold-active extracellular protease produced by Janthinobacterium. Furthermore, we identified a serine-protease gene (named JSP8A) showing 60% identity (98% query coverage) to subtilisin peptidases belonging to the S8 family (S8A subfamily) of many cyanobacteria. A phylogenetic analysis of the JSP8A protease, along with related bacterial protein sequences, confirms that JSP8A clusters with S8A subtilisin sequences from different cyanobacteria, and is clearly separated from S8A bacterial sequences of other phyla (including its own). An analysis of the genomic organization around JSP8A suggests that this protease gene was acquired in an event that duplicated a racemase gene involved in transforming L- to D-amino acids. Our results suggest that AU11 probably acquired this subtilisin-like protease gene by horizontal gene transfer (HGT) from a cyanobacterium. We discuss the relevance of a bacterial protease-HGT in the Antarctic environment in light of this hypothesis. |
format |
Article in Journal/Newspaper |
author |
Martinez-Rosales, Cecilia Marizcurrena, Juan José Iriarte, Andrés Fullana, Natalia Musto, Héctor Castro-Sowinski, Susana |
author_facet |
Martinez-Rosales, Cecilia Marizcurrena, Juan José Iriarte, Andrés Fullana, Natalia Musto, Héctor Castro-Sowinski, Susana |
author_sort |
Martinez-Rosales, Cecilia |
title |
Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event |
title_short |
Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event |
title_full |
Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event |
title_fullStr |
Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event |
title_full_unstemmed |
Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event |
title_sort |
characterizing proteases in an antarctic janthinobacterium sp. isolate: evidence of a protease horizontal gene transfer event |
publisher |
Polar Research Institute of China - PRIC |
publishDate |
2015 |
url |
http://library.arcticportal.org/2562/ http://library.arcticportal.org/2562/1/A20150111.pdf |
genre |
Advances in Polar Science Antarc* Antarctic King George Island Polar Science Polar Science |
genre_facet |
Advances in Polar Science Antarc* Antarctic King George Island Polar Science Polar Science |
op_relation |
http://library.arcticportal.org/2562/1/A20150111.pdf Martinez-Rosales, Cecilia and Marizcurrena, Juan José and Iriarte, Andrés and Fullana, Natalia and Musto, Héctor and Castro-Sowinski, Susana (2015) Characterizing proteases in an Antarctic Janthinobacterium sp. isolate: Evidence of a protease horizontal gene transfer event. Advances in Polar Science, 26 (1). pp. 88-95. |
_version_ |
1782333411370729472 |