CAS 244049-41-0 MUC5AC基序肽;MUC5ACmotifpeptide

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CAS 244049-41-0 MUC5AC基序肽;MUC5ACmotifpeptide
Details
Mucin MUC5AC tandem-repeat motif peptide;
Category: Mucin epitope / airway mucin research peptide.
Peptide Purity (HPLC) ≥95%
CAS No. 244049-41-0
Structure Linear VNTR motif peptide (MUC5AC motif)
Solubility Water, dilute acetic acid/PBS
Storage Powder, −20°C, dry, light-protected
Category
Epitope Peptides
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Description

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Description The MUC5AC (secreted gel-forming mucin) VNTR motif; MUC5AC is the major goblet-cell airway mucin linked to mucus hypersecretion/asthma; used for mucin epitopes and mucosal immunity.

 

Product Basic Information Table

 

Product Standard English Name Product Abbreviation / Alias Function Tags (comma-separated) Core Structure Molecular Formula Exact Mass (Da) Average MW (Da) Salt Form Length (aa)
MUC5AC motif peptide (human MUC5AC mucin tandem-repeat motif 16-mer GTTPSPVPTTSTTSAP) MUC5AC motif peptide; GTTPSPVPTTSTTSAP; MUC5AC tandem repeat; GalNAc-T substrate peptide; CAS 244049-41-0 Mucin MUC5AC, tandem repeat motif, O-glycosylation substrate, GalNAc-T (polypeptide GalNAc-transferase), Thr/Ser sites, respiratory mucus, glycosylation research, synthetic peptide H-Gly-Thr-Thr-Pro-Ser-Pro-Val-Pro-Thr-Thr-Ser-Thr-Thr-Ser-Ala-Pro-OH (GTTPSPVPTTSTTSAP, linear 16-mer free acid). Mimics one repeat unit of the human MUC5AC mucin tandem repeat (TR) domain; rich in Thr x6 and Ser x3, it is a canonical synthetic substrate for UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferases (GalNAc-T1/T2/T3 etc.) that initiate O-glycosylation (Tn antigen, GalNAc alpha1-O-Ser/Thr); Pro x4 provides backbone flexibility and beta-turn character; free N-terminal amine and free C-terminal carboxyl; no Cys/Met/Trp/Tyr. C63H104N16O26 1500.73 1501.61 Free acid (matches supplier-published formula C63H104N16O26) 16

 

Physicochemical Solubility & Storage Parameters

 

Product Code Appearance Long-term Storage Short-term Storage Solution Stability Solid Powder Stability
PEP-MUC5AC-01 White to off-white powder (CAS 244049-41-0) Store frozen below -20 C, dry and sealed; stable approx. 2-3 years as powder Store at 2-8 C sealed and dry, use within 2-4 weeks; after reconstitution aliquot and store at -20 C Good water solubility (hydroxylated Thr x6 / Ser x3, only one hydrophobic Val); reconstitute directly in sterile water or neutral buffer; no Met (no oxidation), no Cys (no oxidation/disulfide), no Trp/Tyr (no photolability); after reconstitution, aliquot and freeze to avoid repeated freeze-thaw powder stable long-term (~2-3 years) at -20 C, dry and sealed; no Met/Trp so low oxidation/photodegradation risk; mainly keep moisture-proof

 

Functional Description

 

Product Code Frontend Short Summary Detailed Biological Function Description Applicable Research Areas (comma-separated) Targets / Receptors
PEP-MUC5AC-01 MUC5AC motif peptide (GTTPSPVPTTSTTSAP, CAS 244049-41-0) is a 16-mer mimicking the human MUC5AC mucin tandem-repeat unit, rich in Thr/Ser O-glycosylation sites and used as a canonical substrate to study the acceptor specificity of polypeptide GalNAc-transferases and hierarchical O-glycosylation. MUC5AC motif peptide (GTTPSPVPTTSTTSAP, CAS 244049-41-0) is a 16-residue synthetic peptide that faithfully reproduces one repeat unit of the central tandem repeat (TR) domain of human mucin 5AC (MUC5AC). MUC5AC is a major gel-forming mucin of airway, gastric and cervical mucus gels; its polypeptide backbone is densely modified by O-linked N-acetylgalactosamine (Tn antigen) initiated by the UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase (ppGalNAc-T / GalNT) family, and further elongated by downstream glycosyltransferases into complex O-glycans. The peptide carries six Thr and three Ser residues with a Pro-rich (x4) backbone and was the model substrate used by Tetaert et al. (2001) to compare the acceptor-site specificities of the three major isoforms GalNT1, GalNT2 and GalNT3: after in vitro transfer reactions, products were separated by capillary electrophoresis, the number of incorporated GalNAc residues was determined by MALDI-TOF MS and the sites located by Edman degradation. A maximum of three GalNAc residues could be transferred onto the peptide; Thr clusters proved essential for backbone recognition, supporting the view that different GalNT isoforms O-glycosylate mucin backbones in a hierarchical order. It is widely used to study O-glycosylation mechanisms, glycosyltransferase substrate mapping, aberrant tumor O-glycans (Tn/sTn), and respiratory mucin secretion and mucociliary clearance. O-glycosylation mechanisms, ppGalNAc-T/GalNT enzymology, MUC5AC structure and function, respiratory/gastric mucus biology, Tn antigen and tumor-associated glycosylation, glycoproteomics Polypeptide N-acetylgalactosaminyltransferases ppGalNAc-T1/T2/T3 family; MUC5AC tandem-repeat backbone; Thr/Ser O-glycosylation sites

 

 

 

 

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