» Articles » PMID: 26489654

An Intrinsic Mechanism of Secreted Protein Aging and Turnover

Overview
Specialty Science
Date 2015 Oct 23
PMID 26489654
Citations 56
Authors
Affiliations
Soon will be listed here.
Abstract

The composition and functions of the secreted proteome are controlled by the life spans of different proteins. However, unlike intracellular protein fate, intrinsic factors determining secreted protein aging and turnover have not been identified and characterized. Almost all secreted proteins are posttranslationally modified with the covalent attachment of N-glycans. We have discovered an intrinsic mechanism of secreted protein aging and turnover linked to the stepwise elimination of saccharides attached to the termini of N-glycans. Endogenous glycosidases, including neuraminidase 1 (Neu1), neuraminidase 3 (Neu3), beta-galactosidase 1 (Glb1), and hexosaminidase B (HexB), possess hydrolytic activities that temporally remodel N-glycan structures, progressively exposing different saccharides with increased protein age. Subsequently, endocytic lectins with distinct binding specificities, including the Ashwell-Morell receptor, integrin αM, and macrophage mannose receptor, are engaged in N-glycan ligand recognition and the turnover of secreted proteins. Glycosidase inhibition and lectin deficiencies increased protein life spans and abundance, and the basal rate of N-glycan remodeling varied among distinct proteins, accounting for differences in their life spans. This intrinsic multifactorial mechanism of secreted protein aging and turnover contributes to health and the outcomes of disease.

Citing Articles

Engineering of anticancer human immunoglobulin A equipped with albumin for enhanced plasma half-life.

Mester S, Chan C, Lustig M, Foss S, Jansen J, Leangen Herigstad M PNAS Nexus. 2025; 4(2):pgaf042.

PMID: 40041621 PMC: 11878800. DOI: 10.1093/pnasnexus/pgaf042.


IgA displays site- and subclass-specific glycoform differences despite equal glycoenzyme expression.

Falck D, Sokolova M, Koeleman C, Irumva V, Kirchner P, Schulz S Cell Commun Signal. 2025; 23(1):92.

PMID: 39962487 PMC: 11834270. DOI: 10.1186/s12964-025-02088-0.


MYO18B promotes lysosomal exocytosis by facilitating focal adhesion maturation.

Ren W, Kawahara R, Suzuki K, Dipta P, Yang G, Thaysen-Andersen M J Cell Biol. 2025; 224(3).

PMID: 39751400 PMC: 11697975. DOI: 10.1083/jcb.202407068.


ASGR1 deficiency improves atherosclerosis but alters liver metabolism in ApoE mice.

Svecla M, Moregola A, Da Dalt L, Nour J, Baragetti A, Uboldi P Cardiovasc Diabetol. 2024; 23(1):428.

PMID: 39616371 PMC: 11608471. DOI: 10.1186/s12933-024-02507-5.


Sialic acids on T cells are crucial for their maintenance and survival.

Schmidt M, Linder A, Korn M, Schellenberg N, Meyer S, Nimmerjahn F Front Immunol. 2024; 15:1359494.

PMID: 38947328 PMC: 11211268. DOI: 10.3389/fimmu.2024.1359494.


References
1.
Coxon A, Rieu P, Barkalow F, Askari S, Sharpe A, von Andrian U . A novel role for the beta 2 integrin CD11b/CD18 in neutrophil apoptosis: a homeostatic mechanism in inflammation. Immunity. 1996; 5(6):653-66. DOI: 10.1016/s1074-7613(00)80278-2. View

2.
Hata K, Koseki K, Yamaguchi K, Moriya S, Suzuki Y, Yingsakmongkon S . Limited inhibitory effects of oseltamivir and zanamivir on human sialidases. Antimicrob Agents Chemother. 2008; 52(10):3484-91. PMC: 2565904. DOI: 10.1128/AAC.00344-08. View

3.
Grewal P, Aziz P, Uchiyama S, Rubio G, Lardone R, Le D . Inducing host protection in pneumococcal sepsis by preactivation of the Ashwell-Morell receptor. Proc Natl Acad Sci U S A. 2013; 110(50):20218-23. PMC: 3864324. DOI: 10.1073/pnas.1313905110. View

4.
Grozovsky R, Jurak Begonja A, Liu K, Visner G, Hartwig J, Falet H . The Ashwell-Morell receptor regulates hepatic thrombopoietin production via JAK2-STAT3 signaling. Nat Med. 2014; 21(1):47-54. PMC: 4303234. DOI: 10.1038/nm.3770. View

5.
Rice K, Lee Y . Modification of triantennary glycopeptide into probes for the asialoglycoprotein receptor of hepatocytes. J Biol Chem. 1990; 265(30):18423-8. View