학술논문
Isolation and characterization of BrMDR1 a novel MDR-type ATP-binding cassette (ABC) transporter in Brassica rapa L.
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- 영문명
- 발행기관
- 한국자원식물학회
- 저자명
- Sun-Yong Lee1 Yu-Jin Jung Kwon-Kyoo Kang
- 간행물 정보
- 『한국자원식물학회지』제22권 제3호, 273~280쪽, 전체 8쪽
- 주제분류
- 농수해양 > 기타농수해양
- 파일형태
- 발행일자
- 2009.06.30
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국문 초록
영문 초록
A cDNA clone encoding a MDR-like ABC transporter protein was isolated from Brassica rapa seedlings, through rapid amplification of cDNA ends (RACE). This gene (named as Brmdr 1; GenBank accession no.: DQ296184 ) had a total length of 4222 bp with an open reading frame of 3900 bp, and encoded a predicted polypeptide of 1300 amino acids with a molecular weight of 143.1 kDa. The BrMDR1 protein shared 71.0, 62.5, 60.0 and 58.2% identity with other MDR proteins isolated from Arabidopsis thaliana (AAN28720), Coptis japonica (CjMDR), Gossypium hirsutum (GhMDR) and Triticum aestivum (TaMDR) at amino acid level, respectively. Southern blot analysis showed that Brmdr1 was a low-copy gene. Expression pattern analysis revealed that Brmdr1 constitutively expressed in the root, stem petals and stamens, but with lower expression in leaves and open flowers. The domains analysis showed that BrMDR1 protein possessed two transmembrane domains (TMDs) and two nucleotide binding domains (NBDs) arranging in TMD1-NBD1-TMD2-NBD2 direction, which is consistent with other MDR transporters. Within NBDs three characteristic motifs common to all ABC transporters, Walker A , Walker B and C motif, were found. These results indicate that BrMDR1 is a MDR-like ABC transporter protein that may be involved in the transport and accumulation of secondary metabolites.
목차
INTRODUCTION
MATERIAL AND METHODS
RESULT AND DISCUSSION
LITERATURE CITED
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