Last updated: 2022-09-30

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Note that any generated files, e.g. HTML, png, CSS, etc., are not included in this status report because it is ok for generated content to have uncommitted changes.


These are the previous versions of the repository in which changes were made to the R Markdown (analysis/PTR_m6A.Rmd) and HTML (docs/PTR_m6A.html) files. If you’ve configured a remote Git repository (see ?wflow_git_remote), click on the hyperlinks in the table below to view the files as they were in that past version.

File Version Author Date Message
html 05a3009 Jing Gu 2022-08-02 PTR_m6A


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Backgrounds

Post-transcriptional regulatory (PTR) processes have been implicated in development and diseases, however, it is largely unknown how genetic variations are mediated through PTR processes. We propose to annotate GWAS variants using both experimental measurements and computational predictions. With this prior knowledge, we can further identify most likely causal variants through fine-mapping and then link them to genes.

Several post-transcriptonal features will be explored:

  • alternative splicing
  • RNA modification: m6A
  • RNA binding
  • Polyadenylation

Results

LDSC enrichment across multiple traits

Version Author Date
05a3009 Jing Gu 2022-08-02

Version Author Date
05a3009 Jing Gu 2022-08-02

Adjusting for transcript-level variations across tissues

We compared the enrichment estimates for m6A peaks in fetal tissues conditional on all coding regions or coding regions from differentially expressed genes in each tissue.

Fetal cell atlas for transcriptomics Cao et al.Science 2020:A human cell atlas of fetal gene expression.

The list DE genes obtained from DEG analysis on pseudobulk transcriptomes, comparing the most expressed tissue and the second most expressed tissue.

For heart tissue, 1011 genes show significantly higher expression than that in the second mostly expressed tissue at FDR 0.05.

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Joint analysis via LDSC

Note: The extended region of $$250 bp away from the coding regions was included to adjust for the unsure boundary. 7.8% of GWAS SNPs are within coding and the extended regions. Only 0.2% of GWAS SNPs are within heart-specific DEGs among fetal samples.


sessionInfo()
R version 4.2.0 (2022-04-22)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: CentOS Linux 7 (Core)

Matrix products: default
BLAS/LAPACK: /software/openblas-0.3.13-el7-x86_64/lib/libopenblas_haswellp-r0.3.13.so

locale:
 [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C         LC_TIME=C           
 [4] LC_COLLATE=C         LC_MONETARY=C        LC_MESSAGES=C       
 [7] LC_PAPER=C           LC_NAME=C            LC_ADDRESS=C        
[10] LC_TELEPHONE=C       LC_MEASUREMENT=C     LC_IDENTIFICATION=C 

attached base packages:
[1] stats4    stats     graphics  grDevices utils     datasets  methods  
[8] base     

other attached packages:
[1] GenomicRanges_1.48.0 GenomeInfoDb_1.32.2  IRanges_2.30.1      
[4] S4Vectors_0.34.0     BiocGenerics_0.42.0  dplyr_1.0.9         
[7] data.table_1.14.2    ggplot2_3.3.6       

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.8.3                lattice_0.20-45            
 [3] Rsamtools_2.12.0            Biostrings_2.64.0          
 [5] assertthat_0.2.1            rprojroot_2.0.3            
 [7] digest_0.6.29               utf8_1.2.2                 
 [9] R6_2.5.1                    evaluate_0.15              
[11] highr_0.9                   pillar_1.7.0               
[13] zlibbioc_1.42.0             rlang_1.0.2                
[15] rstudioapi_0.13             whisker_0.4                
[17] jquerylib_0.1.4             Matrix_1.4-1               
[19] rmarkdown_2.14              labeling_0.4.2             
[21] plyranges_1.16.0            BiocParallel_1.30.3        
[23] stringr_1.4.0               RCurl_1.98-1.7             
[25] munsell_0.5.0               DelayedArray_0.22.0        
[27] rtracklayer_1.56.0          compiler_4.2.0             
[29] httpuv_1.6.5                xfun_0.30                  
[31] pkgconfig_2.0.3             htmltools_0.5.2            
[33] tidyselect_1.1.2            SummarizedExperiment_1.26.1
[35] tibble_3.1.7                GenomeInfoDbData_1.2.8     
[37] workflowr_1.7.0             codetools_0.2-18           
[39] matrixStats_0.62.0          XML_3.99-0.9               
[41] fansi_1.0.3                 crayon_1.5.1               
[43] withr_2.5.0                 later_1.3.0                
[45] GenomicAlignments_1.32.0    bitops_1.0-7               
[47] grid_4.2.0                  jsonlite_1.8.0             
[49] gtable_0.3.0                lifecycle_1.0.1            
[51] DBI_1.1.2                   git2r_0.30.1               
[53] magrittr_2.0.3              scales_1.2.0               
[55] cli_3.3.0                   stringi_1.7.6              
[57] farver_2.1.0                XVector_0.36.0             
[59] fs_1.5.2                    promises_1.2.0.1           
[61] bslib_0.3.1                 ellipsis_0.3.2             
[63] generics_0.1.2              vctrs_0.4.1                
[65] rjson_0.2.21                restfulr_0.0.14            
[67] tools_4.2.0                 Biobase_2.56.0             
[69] glue_1.6.2                  purrr_0.3.4                
[71] MatrixGenerics_1.8.0        parallel_4.2.0             
[73] fastmap_1.1.0               yaml_2.3.5                 
[75] colorspace_2.0-3            knitr_1.39                 
[77] BiocIO_1.6.0                sass_0.4.1