1. I Ia II Ib I IaIb IIIII IV V VI Figure S1. Comparison of amino acid sequence of O. sativa (Os) SUV3 (1-579) with SUV3 from A. thaliana (At) (1-571), H. sapiens (Hs) (1-786) and Saccharomyces cerevisiae (Sc) (1-737). The alignment was done using CLUSTAL W2 program (http://www.ebi.ac.uk). The following symbols denote the degree of conservation observed in each column: "*" means that the residues in that column are identical in all sequences in the alignment, ":" means that conserved substitutions have been observed and "." means that semi-conserved substitutions are observed. The conserved motifs are boxed and the name of each motif is written in roman numerals. The accession numbers for A. thaliana (At), H. sapiens (Hs) and S. cerevisiae (Sc) are BAF01552, NP_003162 and NP_015296 respectively

2. 72 186 214 388 83 191 213 399 A B C Figure S2. (a,b ) The domain analysis OsSUV3 and AtSUV3 proteins. This was done by using ‘Scan Prosite’ at http://expasy.org/tools/scanprosite. Each panel shows the amino acid position and structure of each domain and the numbers are position of respective domains in the protein. (c) Secondary structure of OsSUV3 protein generated by PDBsum server.http://expasy.org/tools/scanprosite

3. KOG0953 Mitochondrial RNA helicase SUV3, DEAD-box superfamily Figure S3. Prediction of OsSUV3 protein interacting proteins. OsSUV3 protein sequence was analyzed with STRING 9.0 at (http://string-db.org ). The results showed the presence of a number of proteins interacting with OsSUV3, which are presented in the table below the figure.http://string-db.org