Structure and functional annotation of hypothetical proteins having putative Rubisco activase function from Vitis
1Centre for Bioinformatics Research, Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.
Bioinformation
|March 18, 2015
Summary
Researchers identified hypothetical proteins in Vitis vinifera with Rubisco activase function. This discovery aids in understanding and potentially improving Rubisco activity for enhanced plant productivity and resource use efficiency.
Area of Science:
- Plant biochemistry and molecular biology
- Protein structure and function analysis
- Bioinformatics and computational biology
Background:
- Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is a key enzyme in photosynthesis, crucial for CO2 assimilation.
- Rubisco activase (Rca) regulates Rubisco activity, significantly impacting plant productivity.
- Identifying novel Rca homologs is vital for crop improvement strategies.
Purpose of the Study:
- To identify and characterize hypothetical proteins in Vitis vinifera with potential Rubisco activase function.
- To elucidate the structural and functional properties of these putative Rca proteins.
- To lay the groundwork for optimizing Rubisco activity in plants.
Main Methods:
- Bioinformatic searches using Arabidopsis and tobacco Rca sequences against the UniprotKB database for Vitis vinifera.
- Sequence, structural, and functional annotation of identified hypothetical proteins.
- Subcellular localization prediction and homology modeling using SWISS-MODEL.
- Functional annotation via PFAM, CATH, SUPERFAMILY, and CDART databases.
Main Results:
- Identified hypothetical proteins in Vitis vinifera with significant sequence identity (>80%) to known tobacco Rca.
- Predicted cytoplasmic localization for these proteins.
- Homology modeling revealed conserved structures belonging to the AAA+ superfamily.
- Functional annotation confirmed the presence of ATPase activity associated with cellular processes.
Conclusions:
- Hypothetical proteins in Vitis vinifera possess characteristics of Rubisco activase.
- These findings provide a basis for future research into enhancing Rubisco functionality.
- Potential for significant implications in improving plant productivity and resource use efficiency.
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