Mutation Analysis (MutSigCV v0.9)
Colorectal Adenocarcinoma (Primary solid tumor)
28 January 2016  |  analyses__2016_01_28
Maintainer Information
Citation Information
Maintained by David Heiman (Broad Institute)
Cite as Broad Institute TCGA Genome Data Analysis Center (2016): Mutation Analysis (MutSigCV v0.9). Broad Institute of MIT and Harvard. doi:10.7908/C1G44PPJ
Overview
Introduction

This report serves to describe the mutational landscape and properties of a given individual set, as well as rank genes and genesets according to mutational significance. MutSigCV v0.9 was used to generate the results found in this report.

  • Working with individual set: COADREAD-TP

  • Number of patients in set: 489

Input

The input for this pipeline is a set of individuals with the following files associated for each:

  1. An annotated .maf file describing the mutations called for the respective individual, and their properties.

  2. A .wig file that contains information about the coverage of the sample.

Summary
  • MAF used for this analysis:COADREAD-TP.final_analysis_set.maf

  • Blacklist used for this analysis: pancan_mutation_blacklist.v14.hg19.txt

  • Significantly mutated genes (q ≤ 0.1): 131

Results
Target Coverage for Each Individual

The x axis represents the samples. The y axis represents the exons, one row per exon, and they are sorted by average coverage across samples. For exons with exactly the same average coverage, they are sorted next by the %GC of the exon. (The secondary sort is especially useful for the zero-coverage exons at the bottom). If the figure is unpopulated, then full coverage is assumed (e.g. MutSig CV doesn't use WIGs and assumes full coverage).

Figure 1. 

Distribution of Mutation Counts, Coverage, and Mutation Rates Across Samples

Figure 2.  Patients counts and rates file used to generate this plot: COADREAD-TP.patients.counts_and_rates.txt

Lego Plots

The mutation spectrum is depicted in the lego plots below in which the 96 possible mutation types are subdivided into six large blocks, color-coded to reflect the base substitution type. Each large block is further subdivided into the 16 possible pairs of 5' and 3' neighbors, as listed in the 4x4 trinucleotide context legend. The height of each block corresponds to the mutation frequency for that kind of mutation (counts of mutations normalized by the base coverage in a given bin). The shape of the spectrum is a signature for dominant mutational mechanisms in different tumor types.

Figure 3.  Get High-res Image SNV Mutation rate lego plot for entire set. Each bin is normalized by base coverage for that bin. Colors represent the six SNV types on the upper right. The three-base context for each mutation is labeled in the 4x4 legend on the lower right. The fractional breakdown of SNV counts is shown in the pie chart on the upper left. If this figure is blank, not enough information was provided in the MAF to generate it.

Figure 4.  Get High-res Image SNV Mutation rate lego plots for 4 slices of mutation allele fraction (0<=AF<0.1, 0.1<=AF<0.25, 0.25<=AF<0.5, & 0.5<=AF) . The color code and three-base context legends are the same as the previous figure. If this figure is blank, not enough information was provided in the MAF to generate it.

CoMut Plot

Figure 5.  Get High-res Image The matrix in the center of the figure represents individual mutations in patient samples, color-coded by type of mutation, for the significantly mutated genes. The rate of synonymous and non-synonymous mutations is displayed at the top of the matrix. The barplot on the left of the matrix shows the number of mutations in each gene. The percentages represent the fraction of tumors with at least one mutation in the specified gene. The barplot to the right of the matrix displays the q-values for the most significantly mutated genes. The purple boxplots below the matrix (only displayed if required columns are present in the provided MAF) represent the distributions of allelic fractions observed in each sample. The plot at the bottom represents the base substitution distribution of individual samples, using the same categories that were used to calculate significance.

Significantly Mutated Genes

Column Descriptions:

  • nnon = number of (nonsilent) mutations in this gene across the individual set

  • npat = number of patients (individuals) with at least one nonsilent mutation

  • nsite = number of unique sites having a non-silent mutation

  • nflank = number of noncoding mutations from this gene's flanking region, across the individual set

  • nsil = number of silent mutations in this gene across the individual set

  • p = p-value (overall)

  • q = q-value, False Discovery Rate (Benjamini-Hochberg procedure)

Table 1.  Get Full Table A Ranked List of Significantly Mutated Genes. Number of significant genes found: 131. Number of genes displayed: 35. Click on a gene name to display its stick figure depicting the distribution of mutations and mutation types across the chosen gene (this feature may not be available for all significant genes).

gene Nnon Nsil Nflank nnon npat nsite nsil nflank nnei fMLE p score time q
CDH1 955506 284109 6920 100 86 72 19 0 20 1.4 0 260 0.75 0
FBXW7 949638 260637 4780 156 130 91 53 3 20 2.7 0 380 1.1 0
BRAF 844503 241077 6780 125 109 55 43 0 19 1.7 6.7e-16 280 0.63 3e-12
CTNNB1 899271 268950 5640 121 93 72 46 0 20 1.7 6.7e-16 260 2.7 3e-12
MUC4 2225928 721764 8040 167 119 67 25 0 2 1.8 8.9e-16 490 1 3e-12
NF2 626409 157947 5600 82 67 62 27 0 20 0.97 1e-15 240 1.4 3e-12
APC 3262608 914430 5820 858 404 436 192 0 4 8.7 1.4e-15 1400 3.2 3.3e-12
SOX9 460638 135453 1040 46 41 43 0 0 20 1.2 1.4e-15 210 0.49 3.3e-12
ARID1A 2184363 643524 7520 96 83 73 19 0 2 1.2 3.2e-15 280 0.56 6.2e-12
RNF43 814185 257703 3500 56 47 28 2 0 8 0.77 3.9e-15 200 0.92 6.2e-12
SMAD4 647436 180441 4440 191 144 120 63 0 20 2.2 3.9e-15 400 0.97 6.2e-12
TP53 462105 134964 4120 446 323 226 68 0 4 7.8 4.1e-15 920 0.71 6.2e-12
NRAS 225429 59658 1640 45 44 17 12 0 20 1.3 5.3e-15 140 0.86 7.1e-12
KRAS 295845 72372 2120 245 231 40 17 5 1 6.6 5.4e-15 520 0.68 7.1e-12
VHL 147678 46455 880 107 80 69 42 0 13 2.4 6.1e-15 250 1.6 7.1e-12
PTEN 476286 114426 3480 341 187 213 138 0 20 3.8 6.2e-15 510 1.1 7.1e-12
PIK3R1 911496 234231 6900 63 51 41 13 1 20 1.5 7.2e-15 160 0.69 7.3e-12
PIK3CA 1270911 325185 7920 344 212 165 130 0 20 3.1 8e-15 450 1.1 7.3e-12
B2M 140343 39120 1280 24 18 18 1 0 20 0.63 8.4e-15 86 0.65 7.3e-12
CRIPAK 481176 159903 460 31 29 17 3 0 20 0.89 8.7e-15 130 1.1 7.3e-12
STK11 243522 70416 940 38 34 26 15 0 20 1.1 8.9e-15 120 0.62 7.3e-12
KIT 1153062 312960 8380 162 112 121 58 0 20 2.1 9.5e-15 240 0.92 7.3e-12
RB1 1392672 367239 9720 148 102 93 48 0 20 1.4 9.5e-15 290 1.1 7.3e-12
TXNDC2 632766 176529 780 27 24 10 2 0 20 0.89 9.5e-15 120 2.1 7.3e-12
MLH1 1164798 329097 7680 70 59 49 17 0 20 1.2 1.2e-14 200 0.64 8.8e-12
EGFR 1506120 411738 11760 116 84 98 49 0 20 1.3 2e-14 190 0.5 1.4e-11
RUNX1 376041 117849 3900 45 41 31 16 0 13 1.4 9.5e-13 110 0.56 6.4e-10
ZFP36L2 247434 79707 320 17 17 14 1 0 20 1.2 1.5e-12 95 3 9.9e-10
SELPLG 421029 151590 620 20 19 11 2 0 20 0.82 9e-12 90 0.94 5.7e-09
FGFR2 1022010 286065 10260 61 53 50 19 0 18 1.3 4.1e-11 140 2.2 2.5e-08
CD58 264060 67971 1800 16 15 14 0 0 20 0.54 7e-11 64 0.61 4.1e-08
TCF7L2 726165 204891 5460 37 34 30 5 11 20 1.4 8.6e-11 120 0.64 4.9e-08
CEBPA 86553 26406 80 17 17 14 5 0 20 1.1 3.6e-10 58 2.4 2e-07
BMPR2 1197561 343767 5200 43 36 40 4 0 20 0.94 9.5e-10 120 1.1 5.1e-07
CBL 975066 288021 6020 45 39 40 15 0 20 0.84 1.6e-09 110 2.1 8.4e-07
CDH1

Figure S1.  This figure depicts the distribution of mutations and mutation types across the CDH1 significant gene.

FBXW7

Figure S2.  This figure depicts the distribution of mutations and mutation types across the FBXW7 significant gene.

BRAF

Figure S3.  This figure depicts the distribution of mutations and mutation types across the BRAF significant gene.

CTNNB1

Figure S4.  This figure depicts the distribution of mutations and mutation types across the CTNNB1 significant gene.

MUC4

Figure S5.  This figure depicts the distribution of mutations and mutation types across the MUC4 significant gene.

NF2

Figure S6.  This figure depicts the distribution of mutations and mutation types across the NF2 significant gene.

APC

Figure S7.  This figure depicts the distribution of mutations and mutation types across the APC significant gene.

SOX9

Figure S8.  This figure depicts the distribution of mutations and mutation types across the SOX9 significant gene.

ARID1A

Figure S9.  This figure depicts the distribution of mutations and mutation types across the ARID1A significant gene.

RNF43

Figure S10.  This figure depicts the distribution of mutations and mutation types across the RNF43 significant gene.

SMAD4

Figure S11.  This figure depicts the distribution of mutations and mutation types across the SMAD4 significant gene.

TP53

Figure S12.  This figure depicts the distribution of mutations and mutation types across the TP53 significant gene.

NRAS

Figure S13.  This figure depicts the distribution of mutations and mutation types across the NRAS significant gene.

KRAS

Figure S14.  This figure depicts the distribution of mutations and mutation types across the KRAS significant gene.

VHL

Figure S15.  This figure depicts the distribution of mutations and mutation types across the VHL significant gene.

PTEN

Figure S16.  This figure depicts the distribution of mutations and mutation types across the PTEN significant gene.

PIK3R1

Figure S17.  This figure depicts the distribution of mutations and mutation types across the PIK3R1 significant gene.

PIK3CA

Figure S18.  This figure depicts the distribution of mutations and mutation types across the PIK3CA significant gene.

B2M

Figure S19.  This figure depicts the distribution of mutations and mutation types across the B2M significant gene.

CRIPAK

Figure S20.  This figure depicts the distribution of mutations and mutation types across the CRIPAK significant gene.

STK11

Figure S21.  This figure depicts the distribution of mutations and mutation types across the STK11 significant gene.

KIT

Figure S22.  This figure depicts the distribution of mutations and mutation types across the KIT significant gene.

RB1

Figure S23.  This figure depicts the distribution of mutations and mutation types across the RB1 significant gene.

TXNDC2

Figure S24.  This figure depicts the distribution of mutations and mutation types across the TXNDC2 significant gene.

MLH1

Figure S25.  This figure depicts the distribution of mutations and mutation types across the MLH1 significant gene.

EGFR

Figure S26.  This figure depicts the distribution of mutations and mutation types across the EGFR significant gene.

RUNX1

Figure S27.  This figure depicts the distribution of mutations and mutation types across the RUNX1 significant gene.

ZFP36L2

Figure S28.  This figure depicts the distribution of mutations and mutation types across the ZFP36L2 significant gene.

SELPLG

Figure S29.  This figure depicts the distribution of mutations and mutation types across the SELPLG significant gene.

FGFR2

Figure S30.  This figure depicts the distribution of mutations and mutation types across the FGFR2 significant gene.

CD58

Figure S31.  This figure depicts the distribution of mutations and mutation types across the CD58 significant gene.

TCF7L2

Figure S32.  This figure depicts the distribution of mutations and mutation types across the TCF7L2 significant gene.

CEBPA

Figure S33.  This figure depicts the distribution of mutations and mutation types across the CEBPA significant gene.

BMPR2

Figure S34.  This figure depicts the distribution of mutations and mutation types across the BMPR2 significant gene.

Methods & Data
Methods

In brief, we tabulate the number of mutations and the number of covered bases for each gene. The counts are broken down by mutation context category: four context categories that are discovered by MutSig, and one for indel and 'null' mutations, which include indels, nonsense mutations, splice-site mutations, and non-stop (read-through) mutations. For each gene, we calculate the probability of seeing the observed constellation of mutations, i.e. the product P1 x P2 x ... x Pm, or a more extreme one, given the background mutation rates calculated across the dataset. [1]

Download Results

In addition to the links below, the full results of the analysis summarized in this report can also be downloaded programmatically using firehose_get, or interactively from either the Broad GDAC website or TCGA Data Coordination Center Portal.

References
[1] TCGA, Integrated genomic analyses of ovarian carcinoma, Nature 474:609 - 615 (2011)