국가연구개발성과
논문 (학술지)
CHIP1 mediates chloroplast anchoring via protein-protein interaction with CHUP1
| 등록번호 | - | SCI 구분
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※구분 : SCI(SCIE포함), 비SCI |
비SCI |
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| 저자명 (주·공동저자) | 공삼근 ; 한재우; Masamitsu Wada; Fumio Takahashi; Aino Komatsu; Koji Okajima; 이경훈; Takayuki Kohchi ※ 과제 참여정보와 일치하는 연구자 상세정보로 정확하지 않을 수 있습니다. 동일저자 논문보기 |
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| 논문구분 | 국외기타논문집 | 학술지명 | - |
| ISSN | 0000-0000 | 학술지 출판일자 | - |
| 학술지 볼륨번호 | 0(0) | 논문페이지 | 1 ~ 10 |
| 학술지 임팩트팩터 | 0.0 | 기여율 | 100 % |
| 초록 | Light influences the life of plants not only as an energy source for photosynthesis but also as an environmental signal. Chloroplast photorelocation movement is essential to optimize photosynthetic ability and/or to prevent photodamage under various light conditions. Chloroplasts accumulate at the cell surface under weak light conditions (accumulation response) and move to the anticlinal walls parallel to the direction of incident light under strong light conditions (avoidance response). Chloroplasts attach to the plasma membrane via chloroplast actin (cp-actin) filaments. During the movement, cp-actin filaments are reorganized dynamically according to light intensity and direction. CHLOROPLAST UNUSUAL POSITIONING1 (CHUP1) is a key player not only for chloroplast movement as an actin nucleator but also in chloroplast anchoring by unknown protein-protein interactions. To investigate the molecular mechanism underlying chloroplast anchoring, we carried out yeast two-hybrid assays and identified a CHUP1-INTERACTING PROTEIN 1 (CHIP1) that is a novel plant-specific gene found only in land plant. The interaction between CHUP1 and CHIP1 was further confirmed by in vitro and in vivo binding assays. Furthermore, CHIP1 was phosphorylated in vitro by phot2. Since Arabidopsis has the other two CHIP1-LIKE genes (CHIL1 and CHIL2), any significant phenotypic changes were not observed in the single and double mutants of CHIP1 family. In contrast, chloroplasts in the chip mutants cell aggregated as shown in chup and kac mutant cells in Marchantia polymorpha that has single copies of those genes. These data suggest that chloroplast anchoring is mediated via protein-protein interaction between CHUP1 and CHIP1. | ||
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