Abstract: Surprisingly, the present inventors have discovered that expression of TAT-005 protein in human patients is associated with cancer, and that the over-expressed protein is present in plasma membrane fractions. Thus, the present inventors have discovered that TAT-005 is associated with abnormal development and growth, and may be useful as a target for the identification of anti-cancer com\ pounds, including antibodies for use in immunotherapy. Accordingly, the present invention provides methods for the identification of compounds that inhibit TAT-005 expression or activity, comprising: contacting a candidate compound with a TAT-005 and detecting the presence or absence of binding between said compound and said TAT-005, or detecting a change in TAT-005 expression or activity. Methods are also included for the identification of compounds that modulate TAT-005 expression or activity, comprising: administering a compound to a cell or cell population, and detecting a change in TAT-005 expression or activity.

Abstract: Surprisingly, the present inventors have discovered that expression of TAT-001 protein in human patients is associated with cancer, and that the overexpressed protein is present in plasma membrane fractions. Thus, the present inventors have discovered that TAT-001 is associated with abnormal development and growth, and may be useful as a target for the identification of anti-cancer compounds, including antibodies for use in immunotherapy. Accordingly, the present invention provides methods for the identification of compounds that inhibit TAT-001 expression or activity, comprising: contacting a candidate compound with a TAT-001 and detecting the presence or absence of binding between said compound and said TAT-001, or detecting a change in TAT-001 expression or activity.

Abstract: Systems, methods, computer programming product, and databases for virtual mass spectrometry (VMS) enable the identification of polypeptides in samples without acquisition of MS/MS fragmentation spectra. Methods according to the invention employ databases containing records corresponding to polypeptides potentially present in samples. In addition to identifying polypeptides, such databases may be used for other purposes, including for example to correct experimental data, e.g., for analytical systemic errors.

Abstract: The invention described herein is a tool developed for the analysis of proteomic mass spectrometry (MS) data to identify and characterize glycoproteins. The tool is designed to perform four main tasks, separately, or as needed: optimize the selection of glycopeptides for MS/MS, identify glycopeptide spectra from MS/MS data, characterize the sugar moieties of identified glycopeptide spectra, and match the glycosylated precursor to its parent protein. The design and implementation for each of these components is described in more depth in this patent application.