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TRANSMEMBRANE PROTEIN 243; TMEM243

TRANSMEMBRANE PROTEIN 243; TMEM243

Alternative titles; symbolsCHROMOSOME 7 OPEN READING FRAME 23; C7ORF23MDR1- AND MITOCHONDRIAL TAXOL RESISTANCE-ASSOCIATED GENE; MMTRAGMGC4175HGNC Approved Gene S...

Alternative titles; symbols

  • CHROMOSOME 7 OPEN READING FRAME 23; C7ORF23
  • MDR1- AND MITOCHONDRIAL TAXOL RESISTANCE-ASSOCIATED GENE; MMTRAG
  • MGC4175

HGNC Approved Gene Symbol: TMEM243

Cytogenetic location: 7q21.12 Genomic coordinates (GRCh38): 7:87,196,159-87,220,586 (from NCBI)

▼ Description
TMEM243 is a mitochondrial protein predicted to play a role in drug resistance in cancer (Duan et al., 2004).

▼ Cloning and Expression
Using microarray analysis to identify genes upregulated in taxol- and doxorubicin-resistant human cancer cell lines, Duan et al. (2004) identified TMEM243, which they called MMTRAG. The deduced 118-amino acid protein has a calculated molecular mass of 13.4 kD. RNA dot blot analysis detected wide expression of MMTRAG in normal and neoplastic tissues. In normal tissues, MMTRAG expression was relatively high in lung, kidney, and thyroid gland. Fluorescence-tagged MMTRAG localized to mitochondria in transfected U2OS cells.

▼ Gene Function
By Northern blot analysis, Duan et al. (2004) found that 7 of 8 taxol- or doxorubicin-resistant human cancer cell lines overexpressed MMTRAG. Expression profiling revealed elevated MMTRAG expression in a high number of taxol- and doxorubicin-treated cancer cell lines.

▼ Gene Structure
Duan et al. (2004) determined that the TMEM243 gene has 4 exons and spans 25.6 kb.

▼ Mapping
By genomic sequence analysis, Duan et al. (2004) mapped the TMEM243 gene to chromosome 7q21.

Hartz (2016) mapped the TMEM243 gene to chromosome 7q21.12 based on an alignment of the TMEM243 sequence (GenBank BC002837) with the genomic sequence (GRCh38).

Tags: 7q21.12

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