University of Texas System

Carlos A Amezcua

Kevin H Gardner

Steven L McKnight

Shannon Harper

Jared Rutter

Carolyn Michnoff

Paul B Card

Paulus J A Erbel

Specific binding of a foreign core ligand to a PAS domain, wherein the PAS domain is predetermined, prefolded in its native state, and comprises a hydrophobic core that has no NMR-apparent a priori formed ligand cavity, is determined using NMR spectra of the PAS domain in the presence and absence of a foreign ligand bound within the hydrophobic core. A functional surface binding specificity of a PAS domain is changed by (a) introducing into the hydrophobic core of the PAS domain a foreign ligand of the PAS domain; and (b) detecting a change in the functional surface binding specificity of the PAS domain.

NMR detection of foreign PAS domain ligands

The invention provides methods and compositions relating to a novel kinase designated PAS Kinase (PASK). The compositions include isolated polypeptides comprising a native PASK protein or a PASK N-terminal domain and polypeptides consisting of a PASK PAS-A or PAS-B domain, as well as isolated polynucleotides encoding such polypeptides, and expression vectors and cells comprising such polynucleotides. The methods include binding assays comprising the steps of incubating a mixture comprising a subject polypeptide with a ligand under conditions wherein the polypeptide binds the ligand; and detecting binding of the polypeptide to the ligand.

PAS kinase

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Dallas, TX, United States of America

Carlos A Amezcua