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Functional assessment of intrinsic disorder central domains of BRCA1
Lumbini R Yadav1, Sharad Rai1, M V Hosur1
1a Tata Memorial Centre, Advanced Centre for Treatment, Research and Education in Cancer , Kharghar , Navi Mumbai , Maharashtra 410 210 , India.
Abstract:
The most studied function of BRCA1 is that of tumor suppression through its role in DNA repair and transcription regulation. Germline mutations discovered in a larger cohort of patients, abrogate BRCA1 interactions with reported cellular partners, and are responsible for breast and ovarian cancer. The different functional regions of BRCA1 interact with nearly 30 different cellular partners. Thus, it becomes clinically significant to understand the detailed protein-protein interactions associated with functional regions of BRCA1. Different overlapping central domains of BRCA1 have been characterized using in silico, in vitro and biophysical approaches. To our conclusions, it has been observed that central domains of BRCA1 are intrinsically disordered and has large hydrodynamic radius with random coil like structures.
Insights
BRCA1 protein
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- The BRCA1 protein is a crucial tumor suppressor involved in DNA repair and transcription regulation.
- Germline mutations in BRCA1 are linked to hereditary breast and ovarian cancers.
- BRCA1 interacts with approximately 30 cellular partners, highlighting the importance of its functional regions.
Purpose of the Study:
- To investigate the structural characteristics of BRCA1's central domains.
- To understand the protein-protein interactions of BRCA1's functional regions for clinical significance.
Main Methods:
- In silico analysis
- In vitro experiments
- Biophysical approaches
Main Results:
- Characterization of overlapping central domains within BRCA1.
- Observation that these central domains are intrinsically disordered.
- Determination of a large hydrodynamic radius and random coil-like structures for these domains.
Conclusions:
- The central domains of BRCA1 exhibit intrinsically disordered characteristics.
- These structural features may influence BRCA1's interactions with cellular partners.
- Understanding these structural properties is vital for comprehending BRCA1's tumor suppressor function and associated cancers.
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