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Updated: Nov 1, 2025

Evaluation of Protein–Protein Interactions using an On-Membrane Digestion Technique
Published on: July 19, 2019
Soluble resistance-related calcium-binding protein participates in multiple diseases via protein-protein interactions
Yinmiao Wang1, Yuanyuan Zhu1, Zhangya Pu2
1Department of Blood Transfusion, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province 410008, China; NHC Key Laboratory of Cancer Proteomics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province 410008, China.
Abstract:
Soluble resistance-related calcium-binding protein (sorcin), a 22 kDa penta-EF-hand protein, has been intensively studied in cancers and multidrug resistance over a prolonged period. Sorcin is widely distributed in tissues and participates in the regulation of Ca2+ homeostasis and Ca2+-dependent signaling. Protein-protein interactions (PPIs) are essential for regulating protein functions in almost all biological processes. Sorcin interaction partners tend to vary in type, including Ca2+ receptors, Ca2+ transporters, endoplasmic reticulum stress markers, transcriptional regulatory elements, immunomodulation-related factors, and viral proteins. Recent studies have shown that sorcin is involved in a broad range of pathological conditions, such as cardiomyopathy, type 2 diabetes mellitus, neurodegenerative diseases, liver diseases, and viral infections. As a multifunctional cellular protein, in these diseases, sorcin has a role by interacting with or regulating the expression of other proteins, such as sarcoplasmic reticulum/endoplasmic reticulum Ca2+ ATPase, ryanodine receptors, presenilin 2, L-type Ca2+ channels, carbohydrate-responsive element-binding protein, tau, α-synuclein, signal transducer and activator of transcription 3, HCV nonstructural 5A protein, and viral capsid protein 1. This review summarizes the roles that sorcin plays in various diseases, mainly via different PPIs, and focuses principally on non-neoplastic diseases to help acquire a more comprehensive understanding of sorcin's multifunctional characteristics.
Insights
Soluble resistance-related calcium-binding protein (sorcin) is a multifunctional protein involved in calcium signaling. This review highlights sorcin
Area of Science:
- Biochemistry and Molecular Biology
- Cellular Physiology
- Disease Pathogenesis
Background:
- Soluble resistance-related calcium-binding protein (sorcin) is a penta-EF-hand protein crucial for calcium (Ca2+) homeostasis and signaling.
- Sorcin's interactions with diverse proteins are fundamental to its regulatory functions across cellular processes.
- While extensively studied in cancer and multidrug resistance, sorcin's roles in non-neoplastic diseases are increasingly recognized.
Purpose of the Study:
- To review and summarize the diverse roles of sorcin in various non-neoplastic diseases.
- To elucidate the mechanisms by which sorcin exerts its functions, primarily through protein-protein interactions (PPIs).
- To provide a comprehensive understanding of sorcin's multifunctional characteristics in a broader pathological context.
Main Methods:
- Literature review of recent studies focusing on sorcin's involvement in non-neoplastic diseases.
- Analysis of reported sorcin interaction partners and their functional implications.
- Synthesis of information on sorcin's regulatory roles in conditions like cardiomyopathy, diabetes, neurodegeneration, liver diseases, and viral infections.
Main Results:
- Sorcin interacts with a wide array of proteins, including Ca2+ channels, receptors, stress markers, and viral proteins.
- These interactions mediate sorcin's involvement in diverse pathological conditions beyond cancer.
- Specific examples include sorcin's interaction with sarcoplasmic reticulum/endoplasmic reticulum Ca2+ ATPase, tau, and viral proteins.
Conclusions:
- Sorcin is a critical multifunctional protein with significant roles in various non-neoplastic diseases.
- Understanding sorcin's protein-protein interaction network is key to deciphering its pathological contributions.
- Further research into sorcin's functions in these diseases may reveal novel therapeutic targets.
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