Projects

ENGINEERING ENZYMATIC REDIRECTION OF NATURAL CROP OIL PRODUCTION TO INDUSTRIAL OIL PRODUCTION Appropriated (D)   Accession Number: 418098

Publications (Clicking on the reprint icon will take you to the publication reprint.)

Molecular properties of the class III subfamily of acyl-coenyzme A binding proteins from tung tree (Vernicia fordii) - (Peer Reviewed Journal)

Pastor, S., Sethumadhavan, K., Ullah, A.H.J., Gidda, S., Cao, H., Mason, C., Chapital, D., Scheffler, B., Mullen, R., Dyer, J., Shockey, J. 2013. Molecular properties of the class III subfamily of acyl-coenyzme A binding proteins from tung tree (Vernicia fordii). Plant Science. 203-204:79-88.

Colorimetric elastase sensor with peptide conjugated cellulose nanocrystals is interfaced to dialysis membranes - (Abstract Only) - (20-Dec-12)

Identification of a soluble phosphatidate phosphohydrolase in the developing cotyledons of Morordica charantia - (Peer Reviewed Journal)

Ullah, A.H.J., Sethumadhavan, K. 2013. Identification of a soluble phosphatidate phosphohydrolase in the developing cotyledons of Morordica charantia. Advances in Biological Chemistry. (3):11-17.

Measuring phosphatidic acid phosphatase (EC 3.1.3.4) activity using two phosphomolybdate-based colorimetric methods - (Peer Reviewed Journal)

Ullah, A.H.J., Sethumadhavan, K., Shockey, J. 2012. Measuring phosphatidic acid phosphatase (EC 3.1.3.4) activity using two phosphomolybdate-based colorimetric methods. Advances in Biological Chemistry. 2:416-421.

Purification, characterization, and bioinformatics studies of phosphatidic acid phosphohydrolase from Lagenaria siceraria - (Peer Reviewed Journal)

Ullah, A.H.J., Sethumadhavan, K., Grimm, C., Shockey, J. 2012. Purification, characterization, and bioinformatics studies of phosphatidic acid phosphohydrolase from Lagenaria siceraria. Advances in Biological Chemistry. 2(4):403-410.

Elimination of a disulfide bridge in Aspergillus niger NRRL 3135 Phytase (PhyA) enhances heat tolerance and optimizes its temperature versus activity profile - (Peer Reviewed Journal)

Mullaney, E., Sethumadhavan, K., Boone, S., Lei, X.G., Ullah, A.H.J. 2012. Elimination of a disulfide bridge in Aspergillus niger NRRL 3135 Phytase (PhyA) enhances heat tolerance and optimizes its temperature versus activity profile. Advances in Biological Chemistry. 2(4):372-378.

Ethanol tolerance in Aspergillus niger and Escherichia coli phytase - (Peer Reviewed Journal)

Mullaney, E.J., Sethumadhavan, K., Boone, S., Ullah, A.H.J. 2012. Ethanol tolerance in Aspergillus niger and Escherichia coli phytase. Advances in Microbiology. 2(3):395-398.

A single mutation in the hepta-peptide active site of Aspergillus niger PhyA phytase leads to myriad of biochemical changes - (Peer Reviewed Journal)

Ullah, A.H.J., Sethumadhavan, K., Boone, S., Mullaney, E.J. 2012. A single mutation in the hepta-peptide active site of Aspergillus niger PhyA phytase leads to myriad of biochemical changes. Advances in Microbiology. 2(3):388-394.

Vanadate inhibition of fungal phyA and bacterial appA2 histidine acid phosphatases - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K., Mullaney, E.J. 2011. Vanadate inhibition of fungal phyA and bacterial appA2 histidine acid phosphatases. Journal of Agricultural and Food Chemistry. (59)1739-1743.

Immobilization of lysozyme on cotton fabrics; synthesis, characterication, and activity - (Peer Reviewed Journal)

Edwards, J.V., Prevost, N.T., Condon, B.D., Sethumadhavan, K., Ullah, A.H. 2011. Immobilization of lysozyme on cotton fabrics; synthesis, characterication, and activity. American Association of Textile Chemists and Colorists Review. 11(3):73-79.

Impact of Assay conditions on activity estimate and kinetics comparison of Aspergillus niger PhyA and Escherichia coli AppA2 phytases - (Peer Reviewed Journal)

Weaver, J.D., Ullah, A.H., Sethumadhavan, K., Mullaney, E.J., Lei, X.G. 2009. Comparisons of activity assay methods and kinetics of Aspergillus niger PhyA and Escherichia coli AppA2 phytases. Journal of Agriculture and Food Chemistry. 57:5315-5320.

Unfolding and Refolding of Aspergillus Niger PhyB Phytase: Role of Disulfide Bridges - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K., Mullaney, E.J. 2008. Unfolding and Refolding of Aspergillus Niger PhyB Phytase: Role of Disulfide Bridges. Journal of Agriculture and Food Chemistry. 56(17):8179-8183.

Kinetic Characterization of O-Phospho-L-Tyrosine Phosphohydrolase Activity of Two Fungal Phytases. - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K., Mullaney, E.J. 2008. Kinetic characterization of o-phospho-L-tyrosine phosphohydrolase activity of two fungal phytases. Journal of Agriculture and Food Chemistry. 56(16):7467-7471.

Salt Effect on the pH Profile and Kinetic Parameters of Microbial Phytases - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K., Mullaney, E.J. 2008. Salt effect on the pH profile and kinetic parameters of microbial phytases. Journal of Agricultural and Food Chemistry. 56:3398-3402.

OPTIMIZING THE PH PROFILE OF FUNGAL PHYTASE THROUGH PROTEIN ENGINEERING ALSO ENHANCES ACTIVITY - (Abstract Only)

Mullaney, E.J., Ullah, A.H., Sethumadhavan, K., Lei2, X. 2007. Optimizing the ph profile of fungal phytase through protein engineering also enhances activity (abstract). Society of Industrial Microbiology Annual Meeting. p. 146.

Enzymatic Comparisons of Aspergillus niger PhyA and Escherichia coli AppA2 Phytases - (Abstract Only)

Weaver, J.D., Ullah, A.H., Sethumadhavan, K., Mullaney, E.J., Lei, X.G. 2007. Enzymatic comparisons of Aspergillus Niger PhyA and Escherichia Coli AppA2 Phytases (abstract). Journal of Animal Science. 85(Supplement 1):647.

New Uses for Immobilized Enzymes and Substrates on Cotton and Cellulose Fibers - (Book / Chapter)

Edwards, J.V., Ullah, A.H., Sethumadhavan, K., Batiste, S.L., Bel, P., Von Hoven, T.M., Goynes Jr, W.R., Condon, B.D., Pierre, S.C. 2007. New Uses for Immobilized Enzymes & Substrates on Cotton & Cellulose Fibers. American Chemical Society Symposium Series. 972:171-185.

SHIFTING THE PH PROFILE OF ASPERGILLUS NIGER PHYA PHYTASE TO MATCH THE STOMACH PH ENHANCES ITS EFFECTIVENESS AS AN ANIMAL FEED ADDITIVE - (Peer Reviewed Journal)

Kim, T., Mullaney, E.J., Porres, J.M., Roneker, K.R., Crowe, S., Rice, S., Ko, T., Ullah, A.H., Daly, C.B., Welch, R.M., Lei, X.G. 2006. Shifting the ph profile of Aspergillus niger PhyA phytase to match the stomach ph enhances its effectiveness as an animal feed additive. Applied and Environmental Microbiology. 72(6):4397-4403.

CONSERVATION OF AN EIGHT-CYSTEINE MOTIF IN FUNGAL HISTIDINE ACID PHOSPHATASES - (Abstract Only)

Mullaney, E.J., Ullah, A.H. 2005. Conservation of an eight-cysteine motif in fungal histidine acid phosphatases (abstract). Mycological Society of America. p. 169.

PHYTASES: ATTRIBUTES, CATALYTIC MECHANISMS AND APPLICATIONS - (Abstract Only)

Mullaney, E.J., Ullah, A.H. 2005. Phytases: attributes, catalytic mechanisms and applications (abstract). Inositol Phosphates in the Plant and Soil System. p.17-18.

MONITORING OF UNFOLDING AND REFOLDING IN FUNGAL PHYTASE (PHYA) BY DYNAMIC LIGHT SCATTERING - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K., Mullaney, E.J. 2005. Monitoring of unfolding and refolding in fungal phytase (phyA) by dynamic light scattering. Biochemical and Biophysical Research Communications. 327(4):993-998.

CONSERVATION OF CYSTEINE RESIDUES IN FUNGAL HISTIDINE ACID PHYTASES - (Peer Reviewed Journal)

Mullaney, E.J., Ullah, A.H., 2005. Conservation of cysteine residues in fungal histidine acid phytases. Biochemical and Biophysical Research Communications. Biochemical and Biophysical Research Communications. 328(2):404-408.

UNFOLDING AND REFOLDING STUDIES OF FUNGAL PHYTASE USING DYNAMIC LIGHT SCATTERING - (Abstract Only)

Ullah, A.H., Sethumadhavan, K. Unfolding and refolding studies of fungal phytase using dynamic light scattering(abstract). American Society for Biochemistry & Molecular Biology Annual Meeting 2004 FASEB Journal, Enzyme Structure, and Function. 8(18):C24.

THE TERM PHYTASE COMPRISES SEVERAL DIFFERENT CLASSES OF ENZYMES - (Peer Reviewed Journal)

Mullaney, E.J., Ullah, A.H. 2003. Phytases comprises structurally different classes of enzymes. Biochemical and Biophysical Research Communications. 312(1):179-184.

FUNGAL PHYA GENE EXPRESSED IN POTATO LEAVES PRODUCES ACTIVE AND STABLE PHYTASE - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K., Mullaney, E.J., Ziegelhoffer, T., Austin-Phillips, S. 2003. Fungal phyA gene expressed in potato leaves produces active and stable phytase. Biochemical and Biophysical Research Communications. 306(2):603-609.

PHYA GENE PRODUCT OF ASPERGILLUS FICUUM AND PENIOPHORA LYCII PRODUCES TWO DISSIMILAR PHYTASES - (Peer Reviewed Journal)

Ullah, A.H., Sethumadhavan, K. 2003. Phya gene product of aspergillus ficuum and peniophora lycii produces two dissimilar phytases. Biochemical and Biophysical Research Communications. 303(2):463-468.

ALTERATION OF THE PH VERSUS ACTIVITY PROFILE OF FUNGAL PHYTASE BY SITE-DIRECTED MUTAGENESIS - (Abstract Only)

Ullah, A.H., Mullaney, E.J. 2003. Alteration of the ph versus activity profile of fungal phytase by site-directed mutagenesis (abstract). European Symposium of the Protein Society.

STRUCTURAL REFINEMENT OF FUNGAL PHYTASE (PHY A)FOR ALTERATION OF PH OPTIMUM - (Abstract Only)

Ullah, A.H., Mullaney, E.J. 2002. Structural refinement of fungal phytase (phy a)for alteration of ph optimum (Abstract). Protein Structure.

GENE CLONING AND CHARACTERIZATION OF PHYTASE ACTIVITY IN FOUR ASPERGILLUS FUMIGATUS ISOLATES - (Peer Reviewed Journal) - (16-Jul-00)

BIOCHEMICAL CHARACTERIZATION OF CLONED ASPERGILLUS FUMIGATUS PHYTASE (PHYA) - (Peer Reviewed Journal) - (11-Jul-00)

ADVANCES IN PHYTASE RESEARCH - (Review Article) - (22-Jun-00)

CHARACTERIZATION OF RECOMBINANT FUNGAL PHYTASE (PHYA) EXPRESSED IN TOBACCO LEAVES - (Peer Reviewed Journal) - (23-Aug-99)

MYO-INOSITOL HEXASULFATE IS A POTENT INHIBITOR OF ASPERGILLUS FICUUM PHYTASE - (Peer Reviewed Journal) - (08-Sep-98)

IDENTIFICATION OA A HISTIDINE ACID PHOSPHATASE (PHYA) LIKE GENE IN ARABIDOPSIS THALIANA - (Peer Reviewed Journal) - (31-Aug-98)

DIFFERENCES IN THE ACTIVE SITE ENVIRONMENT OF ASPERGILLUS FICUUM PHYTASES - (Peer Reviewed Journal) - (30-Dec-97)

CONSERVATION OF THE KIDNEY BEAN PURPLE ACID PHOSPHATASE ACTIVE SITE MOTIF IN THE ASPERGILLUS NIGER (FICUUM) PH 6.0 OPTIMUM ACID PHOSPHATASE - (Peer Reviewed Journal) - (30-Dec-97)

PHYTASE - (Review Article) - (31-Aug-96)

DISULFIDE BONDS ARE NECESSARY FOR STRUCTURE AND ACTIVITY IN ASPERGILLUS FICUUM PHYTASE - (Peer Reviewed Journal) - (26-Aug-96)