TYRP1
Overview
TYRP1 (Tyrosinase Related Protein 1) is a melanosomal enzyme involved in eumelanin biosynthesis and melanocyte identity. It is a canonical lineage marker used to confirm melanocyte cell identity in single-cell studies. In the context of normal-tissue melanocyte biology, TYRP1 serves as a lineage-confirmation marker distinguishing melanocytes from keratinocytes, fibroblasts, and other cell types.
Alterations observed in the corpus
- TYRP1 is used as a melanocyte lineage-confirmation marker in a single-melanocyte multi-omics study (297 clonally-expanded cells, 31 donors; G&T-Seq + SMART-Seq2 + 10X Xenium spatial transcriptomics); expression of TYRP1 (along with PMEL, MLANA, MITF) confirms melanocyte identity across both HighMut and LowMut subpopulations PMID:39975212.
- TYRP1 expression is not differentially enriched in either the HighMut (differentiated/pigmented) or LowMut (neural-crest/stem-like) subpopulations — it is a shared lineage marker rather than a subpopulation discriminator PMID:39975212.
Cancer types (linked)
- SKIN — TYRP1 is a lineage-confirmation marker in normal cutaneous melanocytes, including those from non-lesional skin adjacent to melanoma; no direct oncogenic or tumor-suppressor role is established in the current corpus PMID:39975212.
Co-occurrence and mutual exclusivity
- Co-expressed with PMEL, MLANA, and MITF as a shared melanocyte lineage marker across both HighMut and LowMut subpopulations PMID:39975212.
Therapeutic relevance
- TYRP1 is not a direct therapeutic target in this corpus. It is used to confirm melanocyte identity for cell-type-specific analyses in the context of UV mutagenesis and melanoma precursor biology PMID:39975212.
Open questions
- Whether TYRP1 expression levels differ between follicular (LowMut-enriched) and interfollicular (HighMut-enriched) melanocyte compartments at the protein level in situ is not directly assessed PMID:39975212.
Sources
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