Mutation Analysis (MutSig 2CV v3.1)
Lung 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 (MutSig 2CV v3.1). Broad Institute of MIT and Harvard. doi:10.7908/C17P8XT3
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: LUAD-TP

  • Number of patients in set: 533

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:LUAD-TP.final_analysis_set.maf

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

  • Significantly mutated genes (q ≤ 0.1): 54

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: 54. 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 1891 0 0 4 184 51 31 37 303 287 173 1.1e-14 0.003 1e-05 1e-16 6.1e-13
2 KRAS v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog 709 13 0 0 164 1 0 0 165 161 11 1.2e-15 1e-05 1e-05 1e-16 6.1e-13
3 KEAP1 kelch-like ECH-associated protein 1 1895 21 0 2 71 7 4 10 92 91 82 1e-16 0.16 1e-05 1e-16 6.1e-13
4 EGFR epidermal growth factor receptor (erythroblastic leukemia viral (v-erb-b) oncogene homolog, avian) 3999 4 0 3 51 1 4 29 85 71 38 4.5e-13 1e-05 0.00044 2.2e-16 1e-12
5 STK11 serine/threonine kinase 11 1338 3 0 2 26 19 11 27 83 77 68 1e-16 0.43 0.089 8.9e-16 2.7e-12
6 RBM10 RNA binding motif protein 10 2882 10 0 2 7 12 9 7 35 33 33 1e-15 0.18 0.0062 8.9e-16 2.7e-12
7 RB1 retinoblastoma 1 (including osteosarcoma) 3711 3 0 1 5 9 8 11 33 32 32 2e-16 0.34 0.86 4e-15 1e-11
8 ARID1A AT rich interactive domain 1A (SWI-like) 6934 3 0 3 16 15 2 4 37 33 36 4.5e-14 0.51 0.067 3.3e-13 7.5e-10
9 NF1 neurofibromin 1 (neurofibromatosis, von Recklinghausen disease, Watson disease) 12120 4 0 7 30 10 10 17 67 60 65 2.3e-13 0.095 0.31 6.2e-13 1.2e-09
10 SMARCA4 SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily a, member 4 5189 14 0 5 25 11 5 3 44 41 43 6.4e-13 0.068 0.23 7.9e-13 1.4e-09
11 BRAF v-raf murine sarcoma viral oncogene homolog B1 2371 25 0 1 34 2 6 1 43 39 22 4.9e-08 1e-05 0.0067 1.4e-11 2.4e-08
12 MGA MAX gene associated 9290 2 0 6 20 18 2 7 47 41 47 1.2e-11 1 0.94 3.2e-10 4.9e-07
13 FTSJD1 FtsJ methyltransferase domain containing 1 2317 0 0 0 11 12 0 5 28 28 26 4.7e-10 0.25 0.053 4.4e-10 6.3e-07
14 MET met proto-oncogene (hepatocyte growth factor receptor) 4307 18 0 6 12 1 6 3 22 22 19 0.000011 3e-05 0.025 2.5e-09 3.3e-06
15 GAGE2A G antigen 2A 1486 3 0 0 3 0 0 6 9 9 3 0.000013 1e-05 0.99 3.1e-09 3.8e-06
16 SETD2 SET domain containing 2 7777 3 0 2 19 12 2 8 41 34 41 3.9e-08 1 0.0057 2.2e-08 0.000026
17 U2AF1 U2 small nuclear RNA auxiliary factor 1 824 6 1 1 11 0 0 0 11 11 2 0.00015 1e-05 4e-05 3.3e-08 0.000035
18 ERBB2 v-erb-b2 erythroblastic leukemia viral oncogene homolog 2, neuro/glioblastoma derived oncogene homolog (avian) 3889 5 0 3 3 0 2 7 12 12 8 0.0019 2e-05 0.39 1.6e-06 0.0017
19 CDKN2A cyclin-dependent kinase inhibitor 2A (melanoma, p16, inhibits CDK4) 1002 1 0 3 15 1 2 3 21 20 17 0.018 0.018 1e-05 3e-06 0.0028
20 SRPX sushi-repeat-containing protein, X-linked 1431 6 0 1 7 0 0 7 14 14 9 0.000041 0.0025 0.98 3.2e-06 0.0029
21 ATM ataxia telangiectasia mutated 9438 0 0 2 34 10 3 8 55 46 53 2.5e-06 0.16 0.045 3.5e-06 0.0031
22 TCEAL5 transcription elongation factor A (SII)-like 5 625 21 0 1 12 1 0 2 15 14 14 3.6e-06 0.1 0.88 8.5e-06 0.0071
23 PPP3CA protein phosphatase 3 (formerly 2B), catalytic subunit, alpha isoform 1618 0 0 0 10 1 1 2 14 14 11 0.0045 2e-05 0.72 8.9e-06 0.0071
24 FCRLA Fc receptor-like A 1169 2 0 3 9 0 5 1 15 15 14 3.7e-06 0.15 0.94 0.000013 0.0097
25 ARID2 AT rich interactive domain 2 (ARID, RFX-like) 5588 3 0 6 13 9 5 3 30 27 28 0.000031 0.067 0.043 0.000013 0.0097
26 APC adenomatous polyposis coli 8592 0 0 4 20 3 3 7 33 30 32 0.000026 0.027 0.97 0.000016 0.011
27 ZEB1 zinc finger E-box binding homeobox 1 3421 16 0 7 34 3 0 1 38 36 36 0.000073 0.2 0.034 0.000016 0.011
28 SIP1 survival of motor neuron protein interacting protein 1 881 17 0 0 0 0 1 3 4 4 2 0.013 0.0002 0.0049 0.000018 0.012
29 SLC4A3 solute carrier family 4, anion exchanger, member 3 3872 2 0 1 14 2 5 1 22 21 21 4.6e-06 0.35 0.42 0.000019 0.012
30 STK19 serine/threonine kinase 19 3764 8 0 2 3 0 0 4 7 7 4 0.0025 0.001 0.34 0.000028 0.017
31 NUDT11 nudix (nucleoside diphosphate linked moiety X)-type motif 11 500 94 0 1 0 0 0 5 5 5 1 0.24 1e-05 0.99 0.000034 0.02
32 SLAMF9 SLAM family member 9 882 10 0 1 10 1 2 0 13 12 13 3.8e-06 1 0.46 0.000036 0.02
33 DNMT3A DNA (cytosine-5-)-methyltransferase 3 alpha 2952 16 1 2 19 3 1 1 24 22 24 0.00012 1 0.0042 0.000038 0.021
34 CTNNB1 catenin (cadherin-associated protein), beta 1, 88kDa 2406 0 0 0 19 0 0 1 20 19 13 0.28 1e-05 0.016 0.000038 0.021
35 PTPRU protein tyrosine phosphatase, receptor type, U 4483 1 0 0 13 1 5 0 19 19 18 0.000058 0.18 0.13 0.000059 0.031
TP53

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

KRAS

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

KEAP1

Figure S3.  This figure depicts the distribution of mutations and mutation types across the KEAP1 significant gene.

EGFR

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

STK11

Figure S5.  This figure depicts the distribution of mutations and mutation types across the STK11 significant gene.

RBM10

Figure S6.  This figure depicts the distribution of mutations and mutation types across the RBM10 significant gene.

RB1

Figure S7.  This figure depicts the distribution of mutations and mutation types across the RB1 significant gene.

ARID1A

Figure S8.  This figure depicts the distribution of mutations and mutation types across the ARID1A significant gene.

NF1

Figure S9.  This figure depicts the distribution of mutations and mutation types across the NF1 significant gene.

SMARCA4

Figure S10.  This figure depicts the distribution of mutations and mutation types across the SMARCA4 significant gene.

BRAF

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

MGA

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

MET

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

SETD2

Figure S14.  This figure depicts the distribution of mutations and mutation types across the SETD2 significant gene.

U2AF1

Figure S15.  This figure depicts the distribution of mutations and mutation types across the U2AF1 significant gene.

ERBB2

Figure S16.  This figure depicts the distribution of mutations and mutation types across the ERBB2 significant gene.

CDKN2A

Figure S17.  This figure depicts the distribution of mutations and mutation types across the CDKN2A significant gene.

SRPX

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

ATM

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

TCEAL5

Figure S20.  This figure depicts the distribution of mutations and mutation types across the TCEAL5 significant gene.

PPP3CA

Figure S21.  This figure depicts the distribution of mutations and mutation types across the PPP3CA significant gene.

FCRLA

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

ARID2

Figure S23.  This figure depicts the distribution of mutations and mutation types across the ARID2 significant gene.

APC

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

ZEB1

Figure S25.  This figure depicts the distribution of mutations and mutation types across the ZEB1 significant gene.

SIP1

Figure S26.  This figure depicts the distribution of mutations and mutation types across the SIP1 significant gene.

SLC4A3

Figure S27.  This figure depicts the distribution of mutations and mutation types across the SLC4A3 significant gene.

STK19

Figure S28.  This figure depicts the distribution of mutations and mutation types across the STK19 significant gene.

NUDT11

Figure S29.  This figure depicts the distribution of mutations and mutation types across the NUDT11 significant gene.

SLAMF9

Figure S30.  This figure depicts the distribution of mutations and mutation types across the SLAMF9 significant gene.

DNMT3A

Figure S31.  This figure depicts the distribution of mutations and mutation types across the DNMT3A significant gene.

CTNNB1

Figure S32.  This figure depicts the distribution of mutations and mutation types across the CTNNB1 significant gene.

Methods & Data
Methods

MutSig and its evolving algorithms have existed since the youth of clinical sequencing, with early versions used in multiple publications. [1][2][3]

"Three significance metrics [are] calculated for each gene, using the […] methods MutSigCV [4], MutSigCL, and MutSigFN [5]. These measure the significance of mutation burden, clustering, and functional impact, respectively […]. MutSigCV determines the P value for observing the given quantity of non-silent mutations in the gene, given the background model determined by silent (and noncoding) mutations in the same gene and the neighbouring genes of covariate space that form its 'bagel'. […] MutSigCL and MutSigFN measure the significance of the positional clustering of the mutations observed, as well as the significance of the tendency for mutations to occur at positions that are highly evolutionarily conserved (using conservation as a proxy for probably functional impact). MutSigCL and MutSigFN are permutation-based methods and their P values are calculated as follows: The observed nonsilent coding mutations in the gene are permuted T times (to simulate the null hypothesis, T = 108 for the most significant genes), randomly reassigning their positions, but preserving their mutational 'category', as determined by local sequence context. We [use] the following context categories: transitions at CpG dinucleotides, transitions at other C-G base pairs, transversions at C-G base pairs, mutations at A-T base pairs, and indels. Indels are unconstrained in terms of where they can move to in the permutations. For each of the random permutations, two scores are calculated: SCL and SFN, measuring the amount of clustering and function impact (measured by conservation) respectively. SCL is defined to be the fraction of mutations occurring in hotspots. A hotspot is defined as a 3-base-pair region of the gene containing many mutations: at least 2, and at least 2% of the total mutations. SFN is defined to be the mean of the base-pair-level conservation values for the position of each non-silent mutation […]. To determine a PCL, the P value for the observed degree of positional clustering, the observed value of SCL (computed for the mutations actually observed), [is] compared to the distribution of SCL obtained from the random permutations, and the P value [is] defined to be the fraction of random permutations in which SCL [is] at least as large as the observed SCL. The P value for the conservation of the mutated positions, PFN, [is] computed analogously." [6]

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] Getz G, Höfling H, Mesirov JP, Golub TR, Meyerson M, Tibshirani R, Lander ES, Comment on "The Consensus Coding Sequences of Human Breast and Colorectal Cancers", Science 317(5844):1500b (2007)
[3] TCGA, Integrated genomic analyses of ovarian carcinoma, Nature 474(7353):609-615 (2011)
[4] Lawrence MS, et al., Mutational heterogeneity in cancer and the search for new cancer-associated genes, Nature 499(7457):214-218 (2013)
[6] Lawrence MS, et al., Discovery and saturation analysis of cancer genes across 21 tumour types, Nature 505(7484):495-501 (2014)