PMID- 10051401 OWN - NLM STAT- MEDLINE DCOM- 19990422 LR - 20081121 IS - 0888-7543 (Print) IS - 0888-7543 (Linking) VI - 56 IP - 2 DP - 1999 Mar 1 TI - Human periplakin: genomic organization in a clonally unstable region of chromosome 16p with an abundance of repetitive sequence elements. PG - 160-8 AB - Periplakin, a member of the plakin family of proteins, has been recently characterized by cDNA cloning, and the corresponding gene, PPL, has been mapped to human chromosome 16p13.3 (Aho et al., 1998, Genomics 48: 242-247). Periplakin has also been shown to serve as an autoantigen in a malignancy-associated autoimmune blistering disease, paraneoplastic pemphigus (Mahoney et al., 1998, J. Invest. Dermatol. 111: 308-313). In this study, we have elucidated the intron-exon organization of human PPL and characterized its promoter region. The flanking 5' sequences were rich in G and C ( approximately 80%) and included multiple AP2 sites and a SP1 site, while no canonical TATA or CCAAT sequences were found. The functionality of the upstream sequences (-709 to +135) as a promoter in cultured epidermal keratinocytes was detected by a CAT reporter gene, and a limited region (-382 to +135) showed activity in cultured dermal fibroblasts, attesting to cell-type specificity of the promoter. The genomic organization, including the intron-exon borders, was determined by direct nucleotide sequencing of human genomic P1 clones. Comparative analysis of cDNA and genomic sequences revealed that PPL consists of 22 exons, with the distribution of exons in PPL being consistent with that of other plakin genes: 21 small exons, separated by large introns, encode the amino-terminal globular domain, and 1 large exon encodes the entire rod and the tail domains. Characterization of four P1 clones spanning the PPL locus revealed multiple Alu repeats, 20 of them within 33 kb of the entirely sequenced segments (0.60/kb), in addition to numerous MIR and L1 elements. These repetitive elements could lead to the clonal instability detected throughout the genomic P1 clones and may give rise to the genomic rearrangements possibly underlying the paraneoplastic pemphigus. CI - Copyright 1999 Academic Press. FAU - Aho, S AU - Aho S AD - Department of Biochemistry and Molecular Pharmacology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA. FAU - Rothenberger, K AU - Rothenberger K FAU - Tan, E M AU - Tan EM FAU - Ryoo, Y W AU - Ryoo YW FAU - Cho, B H AU - Cho BH FAU - McLean, W H AU - McLean WH FAU - Uitto, J AU - Uitto J LA - eng SI - GENBANK/AF040999 SI - GENBANK/AF041000 SI - GENBANK/AF041001 SI - GENBANK/AF041002 SI - GENBANK/AF041003 SI - GENBANK/AF041004 GR - P01-AR38923/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Genomics JT - Genomics JID - 8800135 RN - 0 (Cytoskeletal Proteins) RN - 0 (DNA, Recombinant) RN - 0 (PPL protein, human) RN - 0 (Plakins) RN - 9007-49-2 (DNA) RN - EC 2.3.1.28 (Chloramphenicol O-Acetyltransferase) RN - EC 3.1.21.- (DNA Restriction Enzymes) SB - IM MH - Base Sequence MH - Chloramphenicol O-Acetyltransferase/genetics MH - Chromosomes, Human, Pair 16/genetics MH - Cytoskeletal Proteins/*genetics MH - DNA/genetics/metabolism MH - DNA Restriction Enzymes/metabolism MH - DNA, Recombinant/genetics MH - Exons MH - Genes/genetics MH - Genomic Library MH - Humans MH - Introns MH - Molecular Sequence Data MH - Plakins MH - Promoter Regions, Genetic/genetics MH - Repetitive Sequences, Nucleic Acid EDAT- 1999/03/03 00:00 MHDA- 1999/03/03 00:01 CRDT- 1999/03/03 00:00 PHST- 1999/03/03 00:00 [pubmed] PHST- 1999/03/03 00:01 [medline] PHST- 1999/03/03 00:00 [entrez] AID - S0888-7543(98)95704-4 [pii] AID - 10.1006/geno.1998.5704 [doi] PST - ppublish SO - Genomics. 1999 Mar 1;56(2):160-8. doi: 10.1006/geno.1998.5704.