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Qianwen Sun


Qianwen Sun 



Research Area:

We are interested in different aspects of transcriptional gene regulation, and mainly focus on R-loop biology. R-loops are special chromatin structures involving a single-stranded DNA and an ssRNA-ssDNA hybrid, and occur naturally during transcription. We will use Arabidopsis and rice as model systems to investigate fundamental questions in R-loop biology, such as R-loops formation, stabilization and resolution, and how R-loops are able to affect transcription regulation and genome instability. We are also interested in the area of plant epigenetics and epigenomics.


Please find more information about my lab in the following link: http://plant.life.tsinghua.edu.cn/plus/view.php?aid=93.


Selected publications(*correspondence):


1.  Yang Z#, Hou Q#, Cheng L#, Xu W, Hong Y, Li S and Sun Q*. RNase H1 cooperates with DNA gyrases to restrict R-loops and maintain genome integrity in Arabidopsis chloroplast. The Plant Cell, 2017, in press (#contributed equally).

2.  Xu W, Xu H, Li K, Fan Y, Liu Y, Yang X* and Sun Q*. The R-loop is a common chromatin feature of the Arabidopsis genome. Nature Plants, 2017, in press.

3.  Shafiq S#, Chen C#*, Yang J, Cheng L, Ma F, Widemann E and Sun Q*. DNA Topoisomerase 1 prevents R-loops accumulation to modulate auxin-regulated rice root development. Mol Plant, 2017 Jun 5; 10(6):821-833 (#contributed equally).

4.  Shafiq S, Li J and Sun Q*. Functions of plants long non-coding RNAs. Invited review, Biochim Biophys Acta. 2016 Jan;1859(1):155-62. 

5.  Csorba T#, Questa JI#, Sun Q# and Dean C. Antisense COOLAIR mediates the coordinated switching of chromatin states at FLC during vernalization. Proc Natl Acad Sci USA. 2014. 111:16160-5, (#contributed equally).

6.  Wang ZW, Wu Z, Raitskin O, Sun Q and Dean C. Antisense-mediated FLC transcriptional repression requires the P-TEFb transcription elongation factor. Proc Natl Acad Sci USA. 2014. 111:7468-73.

7.  Marquardt S, Raitskin O, Wu Z, Liu F, Sun Q and Dean C. Functional Consequences of Splicing of the Antisense Transcript COOLAIR on FLC Transcription. Mol Cell. 2014. 54:156-65. 

8.  Sun Q, Csorba T, Skourti-Stathaki K, Proudfoot NJ and Dean C. R-Loop Stabilization Represses Antisense Transcription at the Arabidopsis FLC Locus. Science. 2013. 340:619-21.

9.  Qin FJ, Sun QW, Huang LM, Chen XS and Zhou DX. Rice SUVH histone methyltransferase genes display specific functions in chromatin modification and retrotransposon repression. Mol Plant. 2010. 3:773-82. 

10.  Sun Q and Zhou DX. Rice jmjC domain-containing gene JMJ706 encodes H3K9 demethylase required for floral organ development. Proc Natl Acad Sci USA. 2008. 105:13679-84.

11.  Huang L#, Sun Q#, Qin F, Li C, Zhao Y and Zhou DX. Down-regulation of a SILENT INFORMATION REGULATOR2-related histone deacetylase gene, OsSRT1, induces DNA fragmentation and cell death in rice. Plant Physiol. 2007. 144:1508-19. (#contributed equally).



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