Mutation Analysis (MutSig 2CV v3.1)
Sarcoma (Primary solid tumor)
21 August 2015  |  analyses__2015_08_21
Maintainer Information
Citation Information
Maintained by David Heiman (Broad Institute)
Cite as Broad Institute TCGA Genome Data Analysis Center (2015): Mutation Analysis (MutSig 2CV v3.1). Broad Institute of MIT and Harvard. doi:10.7908/C137781T
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. MutSig 2CV v3.1 was used to generate the results found in this report.

  • Working with individual set: SARC-TP

  • Number of patients in set: 245

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:SARC-TP.final_analysis_set.maf

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

  • Significantly mutated genes (q ≤ 0.1): 19

Results
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 1.  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 2.  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 3.  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

  • 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: 19. 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).

rank gene longname codelen nnei nncd nsil nmis nstp nspl nind nnon npat nsite pCV pCL pFN p q
1 TP53 tumor protein p53 1889 5 0 3 49 8 12 20 89 84 75 6.8e-16 0.0032 1e-05 1e-16 1.8e-12
2 ATRX alpha thalassemia/mental retardation syndrome X-linked (RAD54 homolog, S. cerevisiae) 7615 2 0 0 8 14 3 15 40 37 40 1e-16 1 0.23 1.4e-15 1.3e-11
3 RB1 retinoblastoma 1 (including osteosarcoma) 3704 12 0 0 2 8 6 11 27 24 27 1e-16 1 0.35 2.3e-15 1.4e-11
4 NUMBL numb homolog (Drosophila)-like 1866 426 0 0 0 0 0 9 9 9 1 4.1e-09 1e-05 0.97 1.3e-12 5.9e-09
5 MSH3 mutS homolog 3 (E. coli) 3543 8 0 2 0 0 0 9 9 7 5 6e-09 1e-05 1 1.9e-12 6.9e-09
6 EOMES eomesodermin homolog (Xenopus laevis) 2081 117 0 0 1 0 0 5 6 6 2 0.000035 1e-05 1 7.9e-09 0.000024
7 PKD2 polycystic kidney disease 2 (autosomal dominant) 2965 2 0 0 2 0 0 4 6 6 3 3.5e-06 0.00015 0.59 1.8e-08 0.000046
8 LTBP3 latent transforming growth factor beta binding protein 3 4020 2 0 0 0 0 0 5 5 5 2 0.00011 1e-05 0.85 2.5e-08 0.000057
9 SHROOM4 shroom family member 4 4516 6 0 1 0 0 0 8 8 8 3 0.00014 1e-05 1 3e-08 0.000061
10 WNK1 WNK lysine deficient protein kinase 1 8759 13 0 2 1 0 0 5 6 6 2 0.0064 1e-05 3e-05 1.1e-06 0.0021
11 ANP32E acidic (leucine-rich) nuclear phosphoprotein 32 family, member E 831 595 0 0 0 0 0 4 4 4 1 0.0008 0.0001 1 1.4e-06 0.0023
12 PTEN phosphatase and tensin homolog (mutated in multiple advanced cancers 1) 1244 660 0 0 6 0 0 2 8 7 8 5.5e-06 1 0.049 1e-05 0.015
13 KRTAP5-5 keratin associated protein 5-5 716 24 0 1 3 0 0 6 9 7 8 8.3e-06 0.16 0.65 0.000024 0.034
14 TRAF7 TNF receptor-associated factor 7 2113 104 0 0 2 0 0 2 4 4 3 0.00066 0.02 0.04 0.000032 0.041
15 MEGF9 multiple EGF-like-domains 9 1948 96 0 0 0 0 0 3 3 3 1 0.0027 0.001 0.98 0.000037 0.045
16 LOR loricrin 943 0 0 2 0 0 0 6 6 6 2 0.0031 0.00053 1 4e-05 0.045
17 CABLES1 Cdk5 and Abl enzyme substrate 1 1992 206 0 0 0 0 0 3 3 3 1 0.0052 0.001 0.83 0.000069 0.074
18 COL18A1 collagen, type XVIII, alpha 1 5536 11 0 2 5 0 1 2 8 7 8 0.00011 0.039 0.39 0.000074 0.075
19 LHCGR luteinizing hormone/choriogonadotropin receptor 2144 44 0 0 1 1 0 4 6 6 4 0.033 0.00011 1 0.000084 0.081
20 NF1 neurofibromin 1 (neurofibromatosis, von Recklinghausen disease, Watson disease) 12119 1 0 1 4 1 1 5 11 10 11 0.00058 0.017 0.88 0.00012 0.11
21 FOXD2 forkhead box D2 1488 1000 0 0 0 0 0 3 3 3 1 0.012 0.001 1 0.00015 0.13
22 CCNL2 cyclin L2 1680 1 0 0 0 0 0 2 2 2 1 0.0013 0.01 0.54 0.00016 0.13
23 MMP17 matrix metallopeptidase 17 (membrane-inserted) 1850 63 0 0 1 0 0 2 3 3 2 0.0012 0.016 0.99 0.00023 0.18
24 ASTE1 asteroid homolog 1 (Drosophila) 2150 22 0 1 0 0 0 3 3 3 1 0.026 0.001 0.89 0.0003 0.23
25 CHRNA9 cholinergic receptor, nicotinic, alpha 9 1458 77 0 0 3 1 0 0 4 4 4 0.000076 1 0.29 0.00034 0.25
26 COL4A3 collagen, type IV, alpha 3 (Goodpasture antigen) 5291 12 0 0 6 0 1 0 7 5 6 0.12 0.00017 0.89 0.00035 0.25
27 ZNF324B zinc finger protein 324B 1652 60 0 1 3 1 0 0 4 3 4 0.0055 0.012 0.33 0.00039 0.26
28 TAS1R1 taste receptor, type 1, member 1 2549 16 0 0 1 1 0 0 2 2 2 0.00019 1 0.044 0.00042 0.27
29 TMPRSS5 transmembrane protease, serine 5 (spinesin) 1422 93 0 0 2 0 0 1 3 3 3 0.00081 1 0.0066 0.00044 0.28
30 FRAS1 Fraser syndrome 1 12406 2 0 1 6 0 1 0 7 6 7 0.28 0.0076 0.0038 0.00047 0.28
31 PFKL phosphofructokinase, liver 2429 35 0 0 1 2 0 0 3 3 3 0.000043 1 0.75 0.00048 0.28
32 SCAP SREBF chaperone 3928 15 0 0 3 0 1 0 4 3 4 0.025 0.0054 0.15 0.00058 0.33
33 COL7A1 collagen, type VII, alpha 1 (epidermolysis bullosa, dystrophic, dominant and recessive) 9304 6 0 1 1 0 2 2 5 4 5 0.0059 0.0086 0.78 0.00062 0.34
34 MMP3 matrix metallopeptidase 3 (stromelysin 1, progelatinase) 1472 3 0 1 3 1 1 1 6 6 5 0.00077 0.06 0.99 0.00064 0.34
35 AR androgen receptor (dihydrotestosterone receptor; testicular feminization; spinal and bulbar muscular atrophy; Kennedy disease) 2813 60 0 1 5 0 0 1 6 6 5 0.038 0.0008 1 0.00064 0.34
TP53

Figure S1.  This figure depicts the distribution of mutations and mutation types across the TP53 significant gene.

ATRX

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

RB1

Figure S3.  This figure depicts the distribution of mutations and mutation types across the RB1 significant gene.

NUMBL

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

MSH3

Figure S5.  This figure depicts the distribution of mutations and mutation types across the MSH3 significant gene.

EOMES

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

PKD2

Figure S7.  This figure depicts the distribution of mutations and mutation types across the PKD2 significant gene.

LTBP3

Figure S8.  This figure depicts the distribution of mutations and mutation types across the LTBP3 significant gene.

SHROOM4

Figure S9.  This figure depicts the distribution of mutations and mutation types across the SHROOM4 significant gene.

WNK1

Figure S10.  This figure depicts the distribution of mutations and mutation types across the WNK1 significant gene.

ANP32E

Figure S11.  This figure depicts the distribution of mutations and mutation types across the ANP32E significant gene.

PTEN

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

KRTAP5-5

Figure S13.  This figure depicts the distribution of mutations and mutation types across the KRTAP5-5 significant gene.

TRAF7

Figure S14.  This figure depicts the distribution of mutations and mutation types across the TRAF7 significant gene.

MEGF9

Figure S15.  This figure depicts the distribution of mutations and mutation types across the MEGF9 significant gene.

LOR

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

CABLES1

Figure S17.  This figure depicts the distribution of mutations and mutation types across the CABLES1 significant gene.

COL18A1

Figure S18.  This figure depicts the distribution of mutations and mutation types across the COL18A1 significant gene.

LHCGR

Figure S19.  This figure depicts the distribution of mutations and mutation types across the LHCGR 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)