AHK-Cu (commonly referred to as “copper AHK”) is a copper(II)-complexed tripeptide composed of alanine–histidine–lysine coordinated to a copper ion. In laboratory research, AHK-Cu is used as a biochemical tool to investigate copper-dependent peptide coordination chemistry and downstream cellular signaling programs relevant to fibroblast activity, extracellular matrix (ECM) regulation, and endothelial biology in preclinical model systems.

Sequence: (Three-Letter Code): Ala-His-Lys-Cu
Molecular formula: C15H25CuN6O4
Molecular weight: 416.9 g/mol

The histidine residue provides a key coordination site for copper binding, enabling formation of a stable metal–peptide complex. This complex is frequently leveraged in mechanistic experiments examining how copper coordination can influence peptide conformation, redox behavior, and interactions with biomolecular targets under controlled in vitro conditions.

• Fibroblast signaling studies: Investigation of peptide-mediated modulation of fibroblast activation markers and ECM-associated gene expression.
• Extracellular matrix research: Evaluation of collagen/elastin biosynthesis pathways and matrix remodeling programs in cellular and tissue models.
• Endothelial biology: Exploration of pathways governing endothelial cell proliferation, differentiation, and survival in preclinical systems.
• Growth factor signaling: Studies of VEGF- and TGF-β1–linked signaling nodes and transcriptional responses following AHK-Cu exposure.
• Metal–peptide coordination: Use as a reference compound in experiments assessing copper binding, stability, and structure–activity relationships of copper-peptide complexes.

Fibroblasts contribute to ECM homeostasis through production of structural proteins (including collagen and elastin) and secretion of signaling mediators that influence adjacent cell types. Endothelial cells, which form the inner lining of blood vessels, are regulated by growth factors that coordinate angiogenic programs and vascular maintenance.

In mechanistic research, AHK-Cu has been examined for its ability to influence signaling pathways associated with vascular endothelial growth factor (VEGF) and transforming growth factor beta-1 (TGF-β1). These pathways are frequently studied in vitro due to their roles in ECM remodeling, fibroblast phenotype regulation, and endothelial responses in controlled experimental settings.

Copper complexation may further impact the physicochemical behavior of the peptide (e.g., coordination geometry and stability), which can be relevant when designing structure–function experiments involving copper-dependent peptide interactions and downstream molecular readouts.

Preclinical laboratory studies (including in vitro cellular systems and animal-model research) have evaluated AHK-Cu–associated changes in fibroblast behavior and ECM-related protein expression. In cultured skin-derived cells, AHK-Cu exposure has been associated with increased collagen type I production under specific experimental conditions, supporting continued use as a probe for collagen-linked transcriptional and translational pathways [1].

Additional benchtop and preclinical investigations have explored AHK-Cu in experimental designs evaluating follicle-associated cell populations and angiogenesis-related signaling (including VEGF-linked responses) [2]. These studies are commonly referenced for mechanistic context when modeling peptide-driven effects on vascular and connective tissue cell systems in vitro.

AHK-Cu is supplied as a purified research reagent intended for laboratory experimentation. Analytical verification typically includes high-performance liquid chromatography (HPLC) and mass spectrometry (MS) to confirm identity and purity. Standard laboratory handling practices for peptides and metal–peptide complexes are recommended.

1. neova-dna-nourishing-study.pdf. Available at: http://www.dermacaredirect.co.uk/skin/frontend/default/dermacare/pdf/neova-dna-nourishing-study.pdf. (Accessed: 25th July 2016)
2. Pyo, H. K. et al. The effect of tripeptide-copper complex on human hair growth in vitro. Arch. Pharm. Res. 30, 834–839 (2007).

ALL ARTICLES AND PRODUCT INFORMATION PROVIDED ON THIS WEBSITE ARE FOR INFORMATIONAL AND EDUCATIONAL PURPOSES ONLY.

The products offered on this website are furnished for in-vitro studies only. In-vitro studies (Latin: in glass) are performed outside of the body. These products are not medicines or drugs and have not been approved by the FDA to prevent, treat or cure any medical condition, ailment or disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law.

For Laboratory Research Only. Not for human use, medical use, diagnostic use, or veterinary use.