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Rational functions are expressions written as the ratio of two polynomials, and their integrals are evaluated by simplifying the integrand into manageable parts. These functions are classified as proper or improper based on the degrees of the numerator and denominator.A rational function is proper when the degree of the numerator is less than the degree of the denominator. In this case, partial fraction decomposition is used to rewrite the function as a sum of simpler rational terms. The...
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Continuous probability distributions are used to model random variables that can take on any real value within a specified range. These variables do not take on isolated or countable values but rather exist on a continuum. For example, the height of an individual can be measured with increasing precision—such as 163.5 or 165.25 centimeters—demonstrating that height is a continuous random variable.The behavior of such variables is described using a probability density function (PDF),...
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ProteoformDB: an integrative database for functional roles of proteoforms.

Hanwen Luo1,2, Sichao Qiu1,2, Maozu Guo3

  • 1School of Software, Shandong University, 1500 Shunhua Road, High-Tech Industrial Development Zone, Jinan, Shandong 250101, China.

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Summary

ProteoDB is a new database integrating proteoform functions across species. It aids research into how molecular events drive functional differences in protein variants, advancing genomics and proteomics.

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Area of Science:

  • Genomics
  • Proteomics
  • Bioinformatics

Background:

  • Proteoforms from alternative splicing expand cellular functions, contributing to genomic and proteomic diversity.
  • Limited databases for proteoform functional annotations hinder research into their functional variations.

Purpose of the Study:

  • Introduce ProteoformDB, a web resource for integrated proteoform functional annotations and analyses.
  • Provide tools for predicting proteoform functions and understanding functional regulatory mechanisms.

Main Methods:

  • Developed a web resource (ProteoformDB) with user-friendly interfaces for data search, visualization, and analysis.
  • Integrated transcript-level functional annotations for proteoforms across multiple species.
  • Enabled analysis of molecular events (sequence, domain, PTMs) impacting proteoform function.

Main Results:

  • ProteoformDB organizes functional annotations for proteoforms from 214 animal and 28 plant species.
  • The resource facilitates investigation into functional differences driven by molecular events.
  • Includes data processing of 154.83 GB.

Conclusions:

  • ProteoformDB serves as a valuable, expandable resource for proteoform function research.
  • It supports studies in genome/transcriptome function, disease mechanisms, and related fields.
  • Aids in uncovering functional differences between protein variants.