Glycyllysine Modification Maintains Nuclear–ER Homeostasis

1. Literature Information

This study reveals that glycyllysine modification is a versatile posttranslational modification regulating DNA damage response, telomere stability, endoplasmic reticulum (ER) ribosome quality control, ERassociated degradation and ERphagy.

2. Research Background

Genome stability and ER homeostasis are essential for cell survival. DNA doublestrand breaks and ER protein misfolding cause severe stress. Classical repair and quality control pathways are wellstudied, but novel regulatory modifications remain largely unknown. Glycyllysine modification has emerged as a critical switch coordinating nuclear and ER functions.

3. Research Approach

Researchers used molecular biology, biochemistry and imaging methods to explore glycyllysine function in DNA repair, telomere maintenance, ribosome quality control and ER homeostasis. They identified UFL1–UFBP1 as key writers and revealed multiple substrates including MRE11, p53, RPL26 and HRD1.

4. Research Outcomes

· Glycyllysine modification of MRE11 promotes MRN complex assembly and ATM activation in DNA damage response.

· It stabilizes p53 by inhibiting ubiquitinmediated degradation.

· At telomeres, it regulates TRF2–SNM1 complex formation and telomere length homeostasis.

· Modified RPL26 directs stalled ribosomes to lysosomal degradation, maintaining ER protein quality.

· It regulates HRD1 in ERAD and cytochrome b5 reductase in ERphagy, ensuring ER homeostasis.

· Dysregulation links to genomic instability, neurodegeneration and tumorigenesis.

5. Product Empowerment

ANT BIO PTE. LTD. provides highly specific glycyllysine antibodies for novel PTM research.

KεGV Rabbit Polyclonal Antibody (Cat. No.: S0B1323)

· Precise specificity for glycyllysine modification, distinguishing from acetylation and methylation.

· High sensitivity for WB, IF, IHC and IP with low background.

· Strict QC ensures stable batch consistency.

· Ideal for novel modification discovery, enzyme study and disease mechanism exploration.

6. Brand Mission

ANT BIO PTE. LTD. is a professional life science reagent supplier offering antibodies, proteins, kits and general reagents. Our subbrands Absin (general reagents & kits), Starter (antibodies) and UA (recombinant proteins) support cuttingedge research in posttranslational modifications, genome stability and disease.

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