In the realm of biochemical rese The pUC/M13 Primers areused to sequence inserts cloned into the M13 vectorsand pUC plasmids developed by Messing.Read more arch and synthetic biology, the m13 pept pUC/M13 Sequencing Primers ide sequence stands out as a foundational tool for studying protein-protein interactions and structural biology. Often associated with the calmodulin-binding domain of skeletal muscle myosin light chain kinase (skMLCK), this 26-amino acid motif has become a standard reference in laboratory settings.
Defining the M13 Peptide
When researchers discuss the peptide M13, they are frequently referring to a specific synthetic segment derived from the skMLCK protein (residues 577–602). This sequence is highly valued for its ability to bind to calmodulin (CaM) with high affinity, making it an essential subject for those analyzing binding kinetics and allosteric switches.
The primary sequence one letter code. KRRWKKNFIAVSAANRFKKISSSGAL represents the standard configuration often cited in structural studies. Alternatively, the amino acid peptide is sometimes truncated or modified, such as in the 19-mer variant (RWKKNFIAVSAANRFKKIS), to refine specific interaction studies.
Contextualizing the Terminology
It is important to distinguish this synthetic peptide from other biological entities that share the M13 nomenclature:
* Enterobacteria phage M13: A filamentous *E. coli* bacteriophage. This virus is a Protein names. Recommended name. Capsid protein G8P. Alternative names. Coat protein B; Gene 8 protein (G8P);M13procoat; Major coat protein; pVIII. Gene names.Read more cornerstone of molecular biology, utilized in sequencing and phage display technologies.
* M13 peptidases: A well-studied family Target recognition by calmodulin: dissecting the kinetics of proteases that includes neprilysin and ECE-1. These are distinct from the synthetic peptide used in biochemical binding assays.
* M13 Vectors: Cloning systems, such as M13mp18 or M13mp19, which are used to sequence inserts cloned into the M13 vectors. These vectors often contain universal sequences that facilitate the reading of genetic information.
Applications in Research
In my personal experience exploring biochemical tools, the utility of the M13 motif lies in its versatility. Whether it is being used to investigate helix-helix interactions or as a probe for calmodulin kinetics, the peptide sequence provides a reliable, reproducible baseline.
For those working with phage display, the M13 system is invaluable. The phage can be used to display small peptides with sequences of 50 amino acids or less, allowing for the screening of high-diversity libraries. In these systems, specific sequences are fused to the Blue: Coat Protein pIII or the major coat pr Ph.D.™ Peptide Display Cloning System otein (pVIII). When designing these experiments, researchers must enter a distinct sequence that is an important, differentiating feature to ensure successful identification of binding partners.
Structural Insights and Variations
The study of peptide M13 often involves looking at how single amino acid substitutions affect binding. For instance, the Asn5Ala mutant is a common variant used to dissect the energetics of the calmodulin-target interaction. Analyzing these sequences requires precise instrumentation and a deep understanding by GM Clore·1993·Cited by 75—The 26-residuepeptide M13used for the solution studies comprises residues 577-602 of the CaM-bind- ing domain of skeletal nmscle MLCK. The solution structure Read more of protein folding, as the peptide acts as a structural mimic of the natural MLCK domain.
Summary of Technical Observations
The term M13 is a multifaceted identifier in biological science. While the synthetic peptide derived from skMLCK is a vital reagent for interaction studies, the broader M13 bacteriophage system remains the workhorse for DNA manipulation and protein engineering. By maintaining a clear distinction between the synthetic peptide motif and the viral cloning vectors, researchers can better leverage these tools for their specific experimental goals.
Whether you are performing DNA sequencing or investigatin An Engineered Calmodulin-Based Allosteric Switch for g the binding affinity of a specific protein domain, understanding the precise sequence of your reagents is the most critical step in ensuring experimental success.