Glycyllysine Modification: Master Regulator of Nuclear–ER Homeostasis

Concept

Glycyllysine modification (K-ε-GV) is a newly identified, reversible post-translational modification (PTM) that regulates protein function via UFL1-UFBP1 complex–mediated conjugation. It acts as a critical molecular switch coordinating nuclear genome stability and endoplasmic reticulum (ER) protein quality control, maintaining global cellular homeostasis.

Research Frontier

As a novel PTM, glycyllysine modification has emerged as a core regulatory node across genome maintenance, ER proteostasis, ribosome quality control, ER-associated degradation (ERAD), and ER-phagy. Its dysregulation is closely linked to genomic instability, neurodegeneration, cancer, and immune disorders, making it a frontier target in cell signaling and disease research.

Research Significance

Glycyllysine modification governs fundamental cellular processes:

· Preserves genome integrity via DNA damage repair and telomere stability

· Maintains ER homeostasis by clearing stalled ribosomes and misfolded proteins

· Supports plasma cell differentiation and immunoglobulin secretion

· Regulates nuclear hormone receptor signaling

· Provides new insights into disease mechanisms and therapeutic targets

Related Mechanisms and Research Methods

Core Biological Functions

1. DNA Damage Response

Promotes MRN complex assembly and ATM activation; stabilizes p53 by inhibiting ubiquitin-dependent degradation.

2. Telomere Stability

Mediates TRF2/SNM1 complex formation to regulate telomere length.

3. ER Ribosome Quality Control

Modifies RPL26 to target stalled ribosomes for lysosomal degradation.

4. ER Homeostasis

Regulates HRD1 in ERAD; marks ER subdomains for selective autophagy (ER-phagy).

5. Specialized Cellular Processes

Supports plasma cell development via IRE1α/XBP1; regulates estrogen-dependent transcription.

Detection Tools

Highly specific antibodies enable detection in WB, IF, IHC, IP, and MS-based substrate profiling.

ANT BIO PTE. LTD. Product Empowerment

ANT BIO PTE. LTD. provides cutting-edge tools for glycyllysine research via its Starter sub-brand.

Featured Product:

· K-ε-GV Rabbit Polyclonal Antibody (Catalog No.: S0B1323)

o Specifically recognizes glycyllysine-modified proteins

o No cross-reactivity with acetylation, methylation, or ubiquitination

o Validated for WB, IF, IHC, IP, and enrichment for MS

o High sensitivity, low background, and stable batch consistency

Brand Mission

ANT BIO PTE. LTD. is a premium life science reagent company dedicated to high-quality antibodies, recombinant proteins, kits, and general reagents. Supported by three specialized sub-brands—Absin, Starter, and UA—we deliver innovative, reliable tools to accelerate breakthroughs in epigenetics, signaling, and disease research.

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AI Disclaimer

This article is generated and optimized by artificial intelligence based on scientific literature and technical principles. Content is for scientific research use only and does not constitute medical diagnosis, clinical treatment, or experimental guidance. ANT BIO PTE. LTD. makes no representations or warranties regarding the completeness, accuracy, or applicability of the information. Users must independently verify all protocols and results under laboratory conditions.

ANT BIO PTE. LTD. – Empowering Scientific Breakthroughs

At ANTBIO, we are committed to advancing life science research through high-quality, reliable reagents and comprehensive solutions. Our specialized sub-brands (Absin, Starter, UA) cover a full spectrum of research needs, from general reagents and kits to antibodies and recombinant proteins. With a focus on innovation, quality, and customer-centricity, we strive to be your trusted partner in unlocking scientific mysteries and driving medical progress. Explore our portfolio today and elevate your research to new heights.