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The epidermal differentiation complex (EDC) is a gene complex comprising over fifty genes encoding proteins involved in the terminal differentiation and cornification of keratinocytes, the primary cell type of the epidermis. In humans, the complex is located on a 1.9 Mbp stretch within chromosome 1q21.
72432 Ensembl ENSG00000133710 ENSMUSG00000055561 UniProt Q9NQ38 Q148R4 RefSeq (mRNA) NM_001127698 NM_001127699 NM_006846 NM_001081180 RefSeq (protein) NP_001121170 NP_001121171 NP_006837 NP_001074649 Location (UCSC) Chr 5: 148.03 – 148.14 Mb Chr 18: 44.1 – 44.16 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Lympho-epithelial Kazal-type-related inhibitor (LEKTI) also known as ...
During this differentiation process, keratinocytes permanently withdraw from the cell cycle, initiate expression of epidermal differentiation markers, and move suprabasally as they become part of the stratum spinosum, stratum granulosum, and eventually corneocytes in the stratum corneum.
The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and hypodermis. [1] The epidermal layer provides a barrier to infection from environmental pathogens [2] and regulates the amount of water released from the body into the atmosphere through transepidermal water loss.
Filaggrin (filament aggregating protein) is a filament-associated protein that binds to keratin fibers in epithelial cells.Ten to twelve filaggrin units are post-translationally hydrolyzed from a large profilaggrin precursor protein during terminal differentiation of epidermal cells. [3]
The apical ectodermal ridge (AER) is a structure that forms from the ectodermal cells at the distal end of each limb bud and acts as a major signaling center to ensure proper development of a limb.
Histologic image showing a section of epidermis. Stratum spinosum labeled slightly below center. The stratum spinosum (or spinous layer/prickle cell layer) [1] is a layer of the epidermis found between the stratum granulosum and stratum basale. [2]
Stomatal patterning is a much more controlled process, as the stoma affects the plant's water retention and respiration capabilities. As a consequence of these important functions, differentiation of cells to form stomata is also subject to environmental conditions to a much greater degree than other epidermal cell types.