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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The complete cDNA sequence of laminin alpha 4 and its relationship to the other human laminin alpha chains.

We previously localised the gene (LAMA4) encoding a novel laminin alpha 4 chain to chromosome 6q21. In this study, we describe the complete coding sequence and compare the protein with the other three known human laminin alpha chains. Although closely linked to LAMA2, the LAMA4 product most closely resembles laminin alpha 3, a constituent of laminin 5. Like laminin alpha 3A, the alpha 4 chain is a truncated version of the alpha 1 and alpha 2 chains, with a much reduced short arm. While the alpha 4 molecule is most similar to alpha 3, it shares some features of the C-terminal domains G4 and G5 in common with alpha 2. Unlike the LAMA3 gene, LAMA4 appears to encode only a single transcript, as determined by 5' rapid amplification of cDNA ends. The cDNA sequence encodes 1816 amino acids, which include a 24-residue signal peptide. The gene is expressed in skin, placenta, heart, lung, skeletal muscle, and pancreas. We have also shown that the mRNA can be readily reverse transcribed and amplified from cultured dermal fibroblasts.[1]


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