Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains
Main Author: | |
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Publication Date: | 2010 |
Other Authors: | , |
Format: | Article |
Language: | eng |
Source: | Brazilian Archives of Biology and Technology |
Download full: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100005 |
Summary: | Amylase production and partial characterization of crude enzyme preparations from two rhizobia strains (R-926 and R-991) were evaluated. For both the strains, maximal amylase activities were achieved during the early-to-mid- exponential growth phase; both were active over a pH range from 4.5 to 8.5 and temperature from 30 to 50 ºC. None of the ions studied (K+, Na+, Ca2+, Hg2+, Mg2+, Mn2+, Cu2+ and Zn2+) was required for the catalytic activity of strain R-926; amylase activity of strain R-991 was stimulated in the presence of K+, Hg2+ and Zn2+. The surfactants SDS, Triton X-100 and Tween-80 did not have a pronounced inhibitory effect on enzyme activities; SDS and Tween-80 caused the highest stimulatory effects. Amylase activities from the rhizobia strains were reduced by up to 30% in the presence of EDTA; amylase activity of R-926 was also inhibited by HgCl2, suggesting that Ca2+and cysteine residues could be important for activity of this strain. |
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Partial characterization of amylases of two indigenous Central Amazonian rhizobia strainsRhizobiumBradyrhizobiumAmylase productionEnzymatic propertiesAmylase production and partial characterization of crude enzyme preparations from two rhizobia strains (R-926 and R-991) were evaluated. For both the strains, maximal amylase activities were achieved during the early-to-mid- exponential growth phase; both were active over a pH range from 4.5 to 8.5 and temperature from 30 to 50 ºC. None of the ions studied (K+, Na+, Ca2+, Hg2+, Mg2+, Mn2+, Cu2+ and Zn2+) was required for the catalytic activity of strain R-926; amylase activity of strain R-991 was stimulated in the presence of K+, Hg2+ and Zn2+. The surfactants SDS, Triton X-100 and Tween-80 did not have a pronounced inhibitory effect on enzyme activities; SDS and Tween-80 caused the highest stimulatory effects. Amylase activities from the rhizobia strains were reduced by up to 30% in the presence of EDTA; amylase activity of R-926 was also inhibited by HgCl2, suggesting that Ca2+and cysteine residues could be important for activity of this strain.Instituto de Tecnologia do Paraná - Tecpar2010-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100005Brazilian Archives of Biology and Technology v.53 n.1 2010reponame:Brazilian Archives of Biology and Technologyinstname:Instituto de Tecnologia do Paraná (Tecpar)instacron:TECPAR10.1590/S1516-89132010000100005info:eu-repo/semantics/openAccessOliveira,Arlem Nascimento deOliveira,Luiz Antonio deAndrade,Jerusa Souzaeng2010-02-25T00:00:00Zoai:scielo:S1516-89132010000100005Revistahttps://www.scielo.br/j/babt/https://old.scielo.br/oai/scielo-oai.phpbabt@tecpar.br||babt@tecpar.br1678-43241516-8913opendoar:2010-02-25T00:00Brazilian Archives of Biology and Technology - Instituto de Tecnologia do Paraná (Tecpar)false |
dc.title.none.fl_str_mv |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
title |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
spellingShingle |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains Oliveira,Arlem Nascimento de Rhizobium Bradyrhizobium Amylase production Enzymatic properties |
title_short |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
title_full |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
title_fullStr |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
title_full_unstemmed |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
title_sort |
Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains |
author |
Oliveira,Arlem Nascimento de |
author_facet |
Oliveira,Arlem Nascimento de Oliveira,Luiz Antonio de Andrade,Jerusa Souza |
author_role |
author |
author2 |
Oliveira,Luiz Antonio de Andrade,Jerusa Souza |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Oliveira,Arlem Nascimento de Oliveira,Luiz Antonio de Andrade,Jerusa Souza |
dc.subject.por.fl_str_mv |
Rhizobium Bradyrhizobium Amylase production Enzymatic properties |
topic |
Rhizobium Bradyrhizobium Amylase production Enzymatic properties |
description |
Amylase production and partial characterization of crude enzyme preparations from two rhizobia strains (R-926 and R-991) were evaluated. For both the strains, maximal amylase activities were achieved during the early-to-mid- exponential growth phase; both were active over a pH range from 4.5 to 8.5 and temperature from 30 to 50 ºC. None of the ions studied (K+, Na+, Ca2+, Hg2+, Mg2+, Mn2+, Cu2+ and Zn2+) was required for the catalytic activity of strain R-926; amylase activity of strain R-991 was stimulated in the presence of K+, Hg2+ and Zn2+. The surfactants SDS, Triton X-100 and Tween-80 did not have a pronounced inhibitory effect on enzyme activities; SDS and Tween-80 caused the highest stimulatory effects. Amylase activities from the rhizobia strains were reduced by up to 30% in the presence of EDTA; amylase activity of R-926 was also inhibited by HgCl2, suggesting that Ca2+and cysteine residues could be important for activity of this strain. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-89132010000100005 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Instituto de Tecnologia do Paraná - Tecpar |
publisher.none.fl_str_mv |
Instituto de Tecnologia do Paraná - Tecpar |
dc.source.none.fl_str_mv |
Brazilian Archives of Biology and Technology v.53 n.1 2010 reponame:Brazilian Archives of Biology and Technology instname:Instituto de Tecnologia do Paraná (Tecpar) instacron:TECPAR |
instname_str |
Instituto de Tecnologia do Paraná (Tecpar) |
instacron_str |
TECPAR |
institution |
TECPAR |
reponame_str |
Brazilian Archives of Biology and Technology |
collection |
Brazilian Archives of Biology and Technology |
repository.name.fl_str_mv |
Brazilian Archives of Biology and Technology - Instituto de Tecnologia do Paraná (Tecpar) |
repository.mail.fl_str_mv |
babt@tecpar.br||babt@tecpar.br |
_version_ |
1750318273595965440 |