Last updated: 2021-05-06

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Knit directory: CLLproteomics_publish_revision/analysis/

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Load packages and datasets

library(limma)
library(DESeq2)
library(tidygraph)
library(igraph)
library(ggraph)
library(pheatmap)
library(ggbeeswarm)
library(cowplot)
library(SummarizedExperiment)
library(tidyverse)

#load datasets
load("../data/patMeta_enc.RData")
load("../data/proteomic_explore_enc.RData")
load("../data/ddsrna_enc.RData")
load("../output/deResList.RData") #precalculated differential expression
load("../output/deResListRNA.RData")

#protCLL <- protCLL[rowData(protCLL)$uniqueMap,]
source("../code/utils.R")
knitr::opts_chunk$set(echo = TRUE, warning = FALSE, message = FALSE,dev = c("png","pdf"))

Overview of differentially expressed proteins

A table of associations with 5% FDR

resList <- filter(resList, Gene == "del11q") %>%
  #mutate(adj.P.Val = adj.P.global) %>% #use IHW corrected P-value
  mutate(Chr = rowData(protCLL[id,])$chromosome_name)
resList %>% filter(adj.P.Val <= 0.05) %>% 
  select(name, Chr,logFC, P.Value, adj.P.Val) %>%
  mutate_if(is.numeric, formatC, digits=2) %>%
  DT::datatable()

How many are on chr11

table(filter(resList,adj.P.Val <= 0.05)$Chr)

11 12 17 22  3  5  6  8  X 
11  1  1  1  4  1  2  2  1 

Heatmap of differentially expressed proteins (5% FDR)

proList <- filter(resList, !is.na(name), adj.P.Val < 0.05) %>% distinct(name, .keep_all = TRUE) %>% pull(id)
plotMat <- assays(protCLL)[["QRILC_combat"]][proList,]
rownames(plotMat) <- rowData(protCLL[proList,])$hgnc_symbol

colAnno <- filter(patMeta, Patient.ID %in% colnames(protCLL)) %>%
  select(Patient.ID, del11q, IGHV.status) %>%
  data.frame() %>% column_to_rownames("Patient.ID")
colAnno$del11q <- ifelse(colAnno$del11q %in% 1, "yes","no")

rowAnno <- rowData(protCLL)[proList,c("chromosome_name","hgnc_symbol"),drop=FALSE] %>% 
  data.frame(stringsAsFactors = FALSE) %>% remove_rownames() %>%
  mutate(onChr11 = ifelse(chromosome_name == "11","yes","no")) %>%
  select(hgnc_symbol, onChr11) %>% data.frame() %>% column_to_rownames("hgnc_symbol")

plotMat <- jyluMisc::mscale(plotMat, censor = 5)

annoCol <- list(del11q = c(yes = "black",no = "grey80"),
                IGHV.status = c(M = colList[3], U = colList[4]),
                onChr11 = c(yes = colList[1],no = "white"))

pheatmap::pheatmap(plotMat, annotation_col = colAnno, scale = "none",
                   annotation_row = rowAnno,
                   clustering_method = "ward.D2",
                   color = colorRampPalette(c(colList[2],"white",colList[1]))(100),
                   breaks = seq(-5,5, length.out = 101), annotation_colors = annoCol, 
                   show_rownames = TRUE, show_colnames = FALSE,
                   treeheight_row = 0)

Volcano plot

plotTab <- resList  %>% mutate(onChr11 = ifelse(Chr %in% "11","yes","no"))
#nameList <- filter(resList, adj.P.Val < 0.1)$name
nameList <- c("ATM","CUL5")
del11qVolcano <- plotVolcano(plotTab, fdrCut =0.05, x_lab="log2FoldChange", posCol = colList[1], negCol = colList[2],
            plotTitle = "del(11)(q22.3)", ifLabel = TRUE, labelList = nameList)
del11qVolcano

Boxplot plot of selected genes

protTab <- sumToTidy(protCLL, rowID = "uniprotID", colID = "patID") %>%
  mutate(count = count_combat)
plotTab <- protTab %>% filter(hgnc_symbol %in% nameList) %>%
  mutate(del11q = patMeta[match(patID, patMeta$Patient.ID),]$del11q) %>%
  mutate(status = ifelse(del11q %in% 1,"del(11)(q22.3)","other"),
         name = hgnc_symbol) %>%
  mutate(status = factor(status, levels = c("other","del(11)(q22.3)")))
pList <- plotBox(plotTab, pValTabel = resList, y_lab = "Protein expression")
del11qBox <- cowplot::plot_grid(plotlist= pList, ncol=1)
del11qBox

Compare with RNA sequencing data

Plot RNA and protein expression in the chromosome regions around 11q22.3

load("../data/exprCNV_enc.RData")

Normalize protein and RNA expression

normalized <- TRUE
#if perform normalization
if (normalized) {
  #for protein
  exprMat <- select(allProtTab,patID, id,expr) %>% 
    distinct(patID, id, .keep_all = TRUE) %>%
    spread(key = patID, value =expr) %>% data.frame() %>% 
    column_to_rownames("id") %>% as.matrix()
  qm <- jyluMisc::mscale(exprMat, useMad = F)
  normTab <- data.frame(qm) %>% rownames_to_column("id") %>%
    gather(key = "patID", value = "expr", -id)
  allProtTab <- select(allProtTab, -expr) %>% left_join(normTab, by = c("patID","id"))


  #for RNA
  exprMat <- select(allRnaTab,patID, id,expr) %>% 
    distinct(patID, id, .keep_all = TRUE) %>%
    spread(key = patID, value =expr) %>% data.frame() %>% 
    column_to_rownames("id") %>% as.matrix()
  qm <- jyluMisc::mscale(exprMat, useMad = F)
  normTab <- data.frame(qm) %>% rownames_to_column("id") %>%
    gather(key = "patID", value = "expr", -id)
  allRnaTab <- select(allRnaTab, -expr) %>% left_join(normTab, by = c("patID","id"))
}

Function for plotting

plotExprCNV <- function(pat, chr, allBand, allLine, allProtTab, allRnaTab, ifTrend = FALSE, plotTitle = "", 
                        startPos = -Inf, endPos= Inf, showLabel = "none", plotDiff = FALSE, errorBar = FALSE) {
  
  multiPat <- length(unique(pat)) > 1
  
  #table for cyto band
  bandTab <- filter(allBand, ChromID == chr)
  
  #table for expression
  plotProtTab <- filter(allProtTab, ChromID == chr, patID %in% pat) %>%
    mutate(expression = "protein") %>%
    mutate_if(is.factor,as.character)
  
  plotRnaTab <- filter(allRnaTab, ChromID == chr, patID %in% pat) %>%
    mutate(expression = "rna") %>% mutate_if(is.factor,as.character)
  
  if (!plotDiff) {
    plotExprTab <- bind_rows(plotRnaTab, plotProtTab) %>% 
      filter(start_position > startPos, end_position < endPos)
  } else {
    plotProtTab <- plotProtTab %>% dplyr::rename(protein = expr)
    plotRnaTab <- plotRnaTab %>% select(id, expr) %>%
      dplyr::rename(rna = expr)
    plotExprTab <- left_join(plotProtTab, plotRnaTab, by = "id") %>%
      mutate(expr = protein-rna, expression = "protein-rna") %>%
      filter(start_position > startPos, end_position < endPos) %>%
      select(-protein,-rna)
  }
  
  if (multiPat) {
    se <- function(x) sqrt(var(x,na.rm = T)/length(x))
    plotExprTab <- group_by(plotExprTab, id, symbol, ChromID, start_position, end_position,mid_position, expression) %>%
      summarise(upper = mean(expr,na.rm=T) + 1.96*se(expr), lower = mean(expr,na.rm=T) - 1.96*se(expr),
                expr = mean(expr)) %>%
      ungroup()
  }
  
  #table for copy number
  plotLineTab <- filter(allLine, patID %in% pat, ChromID == chr) 
  
  #plot range
  maxVal <- max(c(max(plotExprTab$expr,na.rm = T),max(plotLineTab$SegmentMean,na.rm = T)),na.rm = T) + 1
  minVal <- min(c(min(plotExprTab$expr, na.rm = T),min(plotLineTab$SegmentMean,na.rm = T)),na.rm = T) - 1
  #maxVal <- 5
  #minVal <- -5
  xMax <- max(bandTab$chromEnd, na.rm = T)
  
  #main plot
  gg <- ggplot() + 
    geom_rect(data=bandTab, mapping=aes(xmin=chromStart, xmax=chromEnd, ymin=minVal, ymax=maxVal, 
                                        fill=Colour, label = band), alpha=0.1) +
    geom_text(data=bandTab, mapping=aes(label=band, x=chromMid), y=maxVal, hjust =1, angle = 90, size=4) +
    geom_rect(data=plotLineTab, 
            mapping=aes(xmin=Start, xmax=End, ymin=SegmentMean, 
                        ymax=SegmentMean+0.5,fill = set),alpha=0.2)
  if (multiPat & errorBar) {
      gg <- gg + geom_errorbar(data = plotExprTab, 
                               aes(x = mid_position, y = expr + 0.25, ymax = upper + 0.25, ymin=lower + 0.25),
                               col = "grey60")
  }
  
  gg <- gg + geom_rect(data = plotExprTab, 
            mapping=aes(xmin=start_position,
                        xmax=end_position, ymin=expr, ymax=expr+0.5,
                        fill = expression, label = symbol), alpha =0.8) +
    #scale_x_continuous(expand=c(0,0),limits = c(max(0,startPos),min(xMax,endPos))) +
    scale_y_continuous(limits = c(minVal, maxVal), sec.axis = sec_axis(~./1, name = "Copy number")) +
    coord_cartesian(xlim = c(max(0,startPos),min(xMax,endPos)), expand = FALSE)+
    xlab("Genomic position [Mb]") + 
    ylab("Expression z-score") + 
    scale_fill_manual(values = c(even = "white",odd = "grey50",
                                 rna = colList[1], protein = colList[2], `protein-rna` = "salmon",
                                 WES = "darkgreen",WGS = "orange", Methylome = "purple")) +
    scale_color_manual(values = c(protein = "blue",rna = "red",`protein-rna` = "salmon")) +
    ggtitle(plotTitle) +
    theme(plot.title = element_text(face = "bold", size = 18),
        axis.text = element_text(size=16),
        axis.title = element_text(size=16),
        axis.line = element_blank(),
        legend.position = "none",
        panel.background = element_blank(),
        panel.grid.major = element_line(colour="grey90", size=0.1))
    
    if (showLabel != "none") {
      gg <- gg + 
        ggrepel::geom_text_repel(data = filter(plotExprTab, 
                                               expression == showLabel),
                                 aes(x=mid_position, y=expr, label = symbol))
    }
    if (ifTrend) {
      gg <- gg + geom_smooth(data =filter(plotExprTab), 
                mapping = aes(y=expr, x= mid_position,
                              color = expression), 
                method = "loess", se=FALSE, span=0.2,
                size =0.2)
    }
    
    
  
    #for legend
    ## if the patient has CNV data
    lgTab <- tibble(x= seq(90),y=seq(90),
                    Expression = c(rep("protein",30), rep("rna",30),rep("protein-rna",30)),
                    CNV_data = rep(c("WES","WGS","Methylome"),30))
    if (nrow(plotLineTab) >0) {
      lgTab <- filter(lgTab, CNV_data %in% unique(plotLineTab$set),
                      Expression %in% unique(plotExprTab$expression))
      lg <- ggplot(lgTab, aes(x=x,y=y)) +
        geom_point(aes(fill = Expression), shape =22,size=3) +
        geom_line(aes(color = CNV_data),size=5) +
        scale_fill_manual(values = c(rna = colList[1], protein = colList[2],`protein-rna` = "salmon")) +
        scale_color_manual(values = c(WES = "darkgreen",WGS = "orange", Methylome = "purple"), guide = FALSE) + 
        theme(legend.position = "bottom", 
              legend.text = element_text(size=16),
              legend.title = element_text(size=16))
    } else {
      lgTab <- filter(lgTab, Expression %in% unique(plotExprTab$expression))
      lg <- ggplot(lgTab, aes(x=x,y=y)) +
        geom_point(aes(fill = Expression), shape =22,size=3) +
        scale_fill_manual(values = c(rna = colList[1], protein = colList[2],`protein-rna` = "salmon")) +
        theme(legend.position = "bottom",
              legend.text = element_text(size=16),
              legend.title = element_text(size=16))
    }
    
    lg <- get_legend(lg)
    
    return(list(main=gg, legend = lg))
}
allLine.wes <- filter(allLine, set == "WES")
patList <- intersect(intersect(filter(patMeta, del11q %in% 1)$Patient.ID,allProtTab$patID),allRnaTab$patID)
g <- plotExprCNV(patList,"chr11",allBand, allLine.wes, allProtTab, allRnaTab, 
                 ifTrend = FALSE, startPos = 92.8, endPos = 123, showLabel = "protein",
                 plotTitle = "chromosome 11: q21 to q24.1")
geneCoordPlot <- plot_grid(g$main, g$legend, ncol = 1, rel_heights = c(1,0.2))
geneCoordPlot


sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS  10.16

Matrix products: default
BLAS:   /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRblas.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

other attached packages:
 [1] latex2exp_0.4.0             forcats_0.5.1              
 [3] stringr_1.4.0               dplyr_1.0.5                
 [5] purrr_0.3.4                 readr_1.4.0                
 [7] tidyr_1.1.3                 tibble_3.1.0               
 [9] tidyverse_1.3.0             cowplot_1.1.1              
[11] ggbeeswarm_0.6.0            pheatmap_1.0.12            
[13] ggraph_2.0.5                ggplot2_3.3.3              
[15] igraph_1.2.6                tidygraph_1.2.0            
[17] DESeq2_1.28.1               SummarizedExperiment_1.18.2
[19] DelayedArray_0.14.1         matrixStats_0.58.0         
[21] Biobase_2.48.0              GenomicRanges_1.40.0       
[23] GenomeInfoDb_1.24.2         IRanges_2.22.2             
[25] S4Vectors_0.26.1            BiocGenerics_0.34.0        
[27] limma_3.44.3               

loaded via a namespace (and not attached):
  [1] utf8_1.1.4             shinydashboard_0.7.1   tidyselect_1.1.0      
  [4] RSQLite_2.2.3          AnnotationDbi_1.50.3   htmlwidgets_1.5.3     
  [7] grid_4.0.2             BiocParallel_1.22.0    maxstat_0.7-25        
 [10] munsell_0.5.0          codetools_0.2-18       DT_0.17               
 [13] withr_2.4.1            colorspace_2.0-0       highr_0.8             
 [16] knitr_1.31             rstudioapi_0.13        ggsignif_0.6.1        
 [19] labeling_0.4.2         git2r_0.28.0           slam_0.1-48           
 [22] GenomeInfoDbData_1.2.3 KMsurv_0.1-5           polyclip_1.10-0       
 [25] bit64_4.0.5            farver_2.1.0           rprojroot_2.0.2       
 [28] vctrs_0.3.6            generics_0.1.0         TH.data_1.0-10        
 [31] xfun_0.21              sets_1.0-18            R6_2.5.0              
 [34] graphlayouts_0.7.1     locfit_1.5-9.4         bitops_1.0-6          
 [37] cachem_1.0.4           fgsea_1.14.0           assertthat_0.2.1      
 [40] promises_1.2.0.1       scales_1.1.1           multcomp_1.4-16       
 [43] beeswarm_0.3.1         gtable_0.3.0           sandwich_3.0-0        
 [46] workflowr_1.6.2        rlang_0.4.10           genefilter_1.70.0     
 [49] splines_4.0.2          rstatix_0.7.0          broom_0.7.5           
 [52] yaml_2.2.1             abind_1.4-5            modelr_0.1.8          
 [55] crosstalk_1.1.1        backports_1.2.1        httpuv_1.5.5          
 [58] tools_4.0.2            relations_0.6-9        ellipsis_0.3.1        
 [61] gplots_3.1.1           jquerylib_0.1.3        RColorBrewer_1.1-2    
 [64] Rcpp_1.0.6             visNetwork_2.0.9       zlibbioc_1.34.0       
 [67] RCurl_1.98-1.2         ggpubr_0.4.0           viridis_0.5.1         
 [70] zoo_1.8-9              haven_2.3.1            ggrepel_0.9.1         
 [73] cluster_2.1.1          exactRankTests_0.8-31  fs_1.5.0              
 [76] magrittr_2.0.1         data.table_1.14.0      openxlsx_4.2.3        
 [79] reprex_1.0.0           survminer_0.4.9        mvtnorm_1.1-1         
 [82] hms_1.0.0              shinyjs_2.0.0          mime_0.10             
 [85] evaluate_0.14          xtable_1.8-4           XML_3.99-0.5          
 [88] rio_0.5.26             readxl_1.3.1           gridExtra_2.3         
 [91] compiler_4.0.2         KernSmooth_2.23-18     crayon_1.4.1          
 [94] htmltools_0.5.1.1      mgcv_1.8-34            later_1.1.0.1         
 [97] geneplotter_1.66.0     lubridate_1.7.10       DBI_1.1.1             
[100] tweenr_1.0.1           dbplyr_2.1.0           MASS_7.3-53.1         
[103] jyluMisc_0.1.5         Matrix_1.3-2           car_3.0-10            
[106] cli_2.3.1              marray_1.66.0          km.ci_0.5-2           
[109] pkgconfig_2.0.3        foreign_0.8-81         piano_2.4.0           
[112] xml2_1.3.2             annotate_1.66.0        vipor_0.4.5           
[115] bslib_0.2.4            XVector_0.28.0         drc_3.0-1             
[118] rvest_1.0.0            digest_0.6.27          rmarkdown_2.7         
[121] cellranger_1.1.0       fastmatch_1.1-0        survMisc_0.5.5        
[124] curl_4.3               shiny_1.6.0            gtools_3.8.2          
[127] nlme_3.1-152           lifecycle_1.0.0        jsonlite_1.7.2        
[130] carData_3.0-4          viridisLite_0.3.0      fansi_0.4.2           
[133] pillar_1.5.1           lattice_0.20-41        fastmap_1.1.0         
[136] httr_1.4.2             plotrix_3.8-1          survival_3.2-7        
[139] glue_1.4.2             zip_2.1.1              bit_4.0.4             
[142] ggforce_0.3.3          stringi_1.5.3          sass_0.3.1            
[145] blob_1.2.1             caTools_1.18.1         memoise_2.0.0