ssK36 peptide

ssK36 peptide

• Handling and Storage of Synthetic Peptides
• Material Safety Data Sheets (MSDS)

Batch to batch variation of the purity

H-APRFGGVKRPNRYRP-OH

H-Ala-Pro-Arg-Phe-Gly-Gly-Val-Lys-Arg-Pro-Asn-Arg-Tyr-Arg-Pro-OH

15

95.17%

C₇₉H₁₂₇N₂₉O₁₈

1771.03

Synthetic

Powder

ssK36, or ssK36 (29–43), is a SET-domain containing protein 2 (SETD2) super substrate. SETD2, also called KMT3A, was first identified as huntingtin interacting protein 1 (HYPB, HIP-1) and can add up to three methyl groups to K36 of histone H39 (H3K36). ssK36 (29-43 has been derived from the currently used SETD2 substrate peptide H3K36 (29-43) but is methylated about 290-fold faster, making it a super substrate. The increased methylation of ssK36 is due to an increase in the rate of catalysis and only to a smaller degree to improved binding.

Normally, this peptide will be delivered in lyophilized form and should be stored in a freezer at or below -20 °C. For more details, please refer to the manual: Handling and Storage of Synthetic Peptides

• Schuhmacher et al (2020) Sequence specificity analysis of the SETD2 protein lysine methyltransferase and discovery of a SETD2 super-substrate. Commun. Biol. 3(1) 511 PMID: 32939018

Trifluoroacetic acid (TFA) has a significant impact on peptides due to its role in the peptide synthesis process.

TFA is essential for the protonation of peptides that lack basic amino acids such as Arginine (Arg), Histidine (His), and Lysine (Lys), or ones that have blocked N-termini. As a result, peptides often contain TFA salts in the final product.

TFA residues, when present in custom peptides, can cause unpredictable fluctuations in experimental data. At a nanomolar (nM) level, TFA can influence cell experiments, hindering cell growth at low concentrations (as low as 10 nM) and promoting it at higher doses (0.5–7.0 mM). It can also serve as an allosteric regulator on the GlyR of glycine receptors, thereby increasing receptor activity at lower glycine concentrations.

In an in vivo setting, TFA can trifluoroacetylate amino groups in proteins and phospholipids, inducing potentially unwanted antibody responses. Moreover, TFA can impact structure studies as it affects spectrum absorption.