Skip to Content
MilliporeSigma
  • In silico characterization of alkaline proteases from different species of Aspergillus.

In silico characterization of alkaline proteases from different species of Aspergillus.

Applied biochemistry and biotechnology (2011-11-11)
Vivek Kumar Morya, Sangeeta Yadav, Eun-Ki Kim, Dinesh Yadav
ABSTRACT

A total of 49 protein sequences of alkaline proteases retrieved from GenBank representing different species of Aspergillus have been characterized for various physiochemical properties, homology search, multiple sequence alignment, motif, and super family search and phylogenetic tree construction. The sequence level homology was obtained among different groups of alkaline protease enzymes, viz alkaline serine protease, oryzin, calpain-like protease, serine protease, subtilisin-like alkaline proteases. Multiple sequence alignment of alkaline protease protein sequence of different Aspergillus species revealed a stretch of conserved region for amino acid residues from 69 to 110 and 130-204. The phylogenetic tree constructed indicated several Aspergillus species-specific clusters for alkaline proteases namely Aspergillus fumigatus, Aspergillus niger, Aspergillus oryzae, Aspergillus clavatus. The distributions of ten commonly observed motifs were analyzed among these proteases. Motif 1 with a signature amino acid sequence of 50 amino acids, i.e., ASFSNYGKVVDIFAPGQDILSCWIGSTTATNTISGTSMATPHIVGLSCYL, was uniformly observed in proteases protein sequences indicating its involvement with the structure and enzymatic function. Motif analysis of acidic proteases of Aspergillus and bacterial alkaline proteases has revealed different signature amino acid sequences. The superfamily search for these proteases revealed the presence of subtilases, serine-carboxyl proteinase, calpain large subunit, and thermolysin-like superfamilies with 45 representing the subtilases superfamily.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Proteinase, bacterial, Type XXIV, 7.0-14.0 units/mg solid, lyophilized powder
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 μL
Estimated to ship on March 22, 2025
$196.00
4 x 25 μL
Estimated to ship on March 22, 2025
$404.00
Sigma-Aldrich
Protease from Bacillus licheniformis, lyophilized powder, for use in Total Dietary Fiber Assay, TDF-100A
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 μL
Estimated to ship on March 22, 2025
$196.00
4 x 25 μL
Estimated to ship on March 22, 2025
$404.00
Sigma-Aldrich
Protease from Bacillus licheniformis, Type VIII, lyophilized powder, 7-15 units/mg solid
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 μL
Estimated to ship on March 22, 2025
$196.00
4 x 25 μL
Estimated to ship on March 22, 2025
$404.00
Sigma-Aldrich
Protease from Bacillus licheniformis, ≥2.4 U/g
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 μL
Estimated to ship on March 22, 2025
$196.00
4 x 25 μL
Estimated to ship on March 22, 2025
$404.00
Sigma-Aldrich
Protease from Bacillus licheniformis, glycerol solution (50%)
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 μL
Estimated to ship on March 22, 2025
$196.00
4 x 25 μL
Estimated to ship on March 22, 2025
$404.00