Mutation Analysis (MutSig 2CV v3.1)
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: DLBC-TP

  • Number of patients in set: 48

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:DLBC-TP.final_analysis_set.maf

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

  • Significantly mutated genes (q ≤ 0.1): 25

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: 25. 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 B2M beta-2-microglobulin 374 655 0 0 8 0 0 4 12 10 11 5.3e-12 0.5 0.2 4.2e-11 7.6e-07
2 MYD88 myeloid differentiation primary response gene (88) 1014 267 0 0 2 5 0 0 7 7 4 5.7e-09 0.046 0.0061 8.3e-10 7.5e-06
3 MLL2 myeloid/lymphoid or mixed-lineage leukemia 2 16826 6 0 3 5 4 1 9 19 14 19 7.8e-09 0.11 0.92 2.2e-08 0.00014
4 HLA-C major histocompatibility complex, class I, C 1131 152 0 1 6 0 0 1 7 7 5 3.6e-06 0.0036 1 5.5e-07 0.0025
5 ZNF814 zinc finger protein 814 2576 43 0 1 13 0 0 0 13 7 4 0.0071 1e-05 0.71 1.2e-06 0.0045
6 CD79B CD79b molecule, immunoglobulin-associated beta 715 18 0 1 5 0 0 1 6 5 3 0.0011 6e-05 0.11 2.1e-06 0.0065
7 TP53 tumor protein p53 1889 168 0 0 3 1 1 0 5 5 5 2.3e-06 1 0.018 2.6e-06 0.0068
8 TNFAIP3 tumor necrosis factor, alpha-induced protein 3 2405 114 0 1 2 1 0 5 8 7 8 2.4e-07 1 0.57 3.9e-06 0.0089
9 TMSB4X thymosin beta 4, X-linked 143 1 0 0 4 0 0 2 6 6 6 4.2e-07 1 0.53 5.5e-06 0.011
10 C1orf127 chromosome 1 open reading frame 127 2520 83 1 0 6 0 2 0 8 2 4 0.063 1e-05 0.87 9.7e-06 0.017
11 APLF aprataxin and PNKP like factor 1799 60 0 0 2 0 0 2 4 3 2 0.0071 0.0001 0.19 0.000011 0.017
12 RHPN2 rhophilin, Rho GTPase binding protein 2 2119 1 0 0 7 0 0 0 7 7 3 0.076 1e-05 0.047 0.000011 0.017
13 CIITA class II, major histocompatibility complex, transactivator 3469 5 0 0 2 1 0 3 6 5 6 9.8e-06 1 0.074 0.000015 0.02
14 KDR kinase insert domain receptor (a type III receptor tyrosine kinase) 4187 23 0 1 6 0 0 0 6 4 4 0.1 1e-05 0.91 0.000015 0.02
15 CARD11 caspase recruitment domain family, member 11 3557 37 0 0 11 0 0 0 11 10 10 0.00047 0.0021 0.22 0.000018 0.022
16 EZH2 enhancer of zeste homolog 2 (Drosophila) 2332 32 0 0 6 0 0 0 6 3 4 0.16 8e-05 0.018 0.000023 0.026
17 NFKBIE nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, epsilon 1525 31 0 0 2 0 0 3 5 4 5 5.7e-06 1 0.14 0.000026 0.028
18 MLH1 mutL homolog 1, colon cancer, nonpolyposis type 2 (E. coli) 4162 33 0 0 5 0 0 0 5 3 3 0.23 1e-05 0.66 0.000032 0.033
19 FAS Fas (TNF receptor superfamily, member 6) 1044 177 0 0 3 0 2 0 5 5 5 0.000019 1 0.12 4e-05 0.039
20 ENOX1 ecto-NOX disulfide-thiol exchanger 1 1988 74 0 0 4 0 0 0 4 4 3 0.053 0.0001 0.99 7e-05 0.064
21 SGK1 serum/glucocorticoid regulated kinase 1 1997 4 0 4 21 0 4 1 26 4 21 0.68 1e-05 0.25 0.000088 0.076
22 IFITM3 interferon induced transmembrane protein 3 (1-8U) 408 567 0 0 3 0 0 0 3 3 1 0.0073 0.001 0.93 0.000093 0.077
23 APOB apolipoprotein B (including Ag(x) antigen) 13804 2 0 1 3 0 0 3 6 3 6 0.42 1e-05 0.96 0.00011 0.081
24 MCM8 minichromosome maintenance complex component 8 2725 82 0 1 5 0 0 0 5 3 3 0.17 2e-05 1 0.00011 0.081
25 ARID1A AT rich interactive domain 1A (SWI-like) 6934 9 0 0 1 2 0 2 5 5 5 0.000032 1 0.19 0.00013 0.095
26 PCDHA10 protocadherin alpha 10 14068 11 0 2 6 0 0 0 6 6 4 0.27 0.0001 0.74 0.00017 0.12
27 LRRC16B leucine rich repeat containing 16B 4277 16 0 0 4 0 0 0 4 4 2 0.17 0.0001 0.97 0.0002 0.14
28 PNPLA7 patatin-like phospholipase domain containing 7 4166 4 0 0 1 0 0 2 3 3 2 0.0033 0.0052 0.89 0.00021 0.14
29 SLC16A8 solute carrier family 16, member 8 (monocarboxylic acid transporter 3) 1532 99 0 0 2 0 1 0 3 3 2 0.0012 0.037 0.12 0.00028 0.18
30 PKHD1L1 polycystic kidney and hepatic disease 1 (autosomal recessive)-like 1 13040 51 0 3 10 0 0 0 10 5 8 0.74 5e-05 0.5 0.00034 0.2
31 HRCT1 histidine rich carboxyl terminus 1 350 351 0 0 4 0 0 0 4 4 3 0.00017 0.11 0.95 0.00037 0.2
32 TYRO3 TYRO3 protein tyrosine kinase 2745 22 0 0 2 0 2 0 4 4 4 0.001 0.031 0.57 0.00037 0.2
33 GSTZ1 glutathione transferase zeta 1 (maleylacetoacetate isomerase) 732 399 0 0 3 0 0 0 3 3 1 0.034 0.001 0.001 0.00038 0.2
34 STAT3 signal transducer and activator of transcription 3 (acute-phase response factor) 2408 39 0 1 7 0 0 1 8 7 8 0.00033 1 0.05 0.00038 0.2
35 IRF8 interferon regulatory factor 8 1312 4 0 1 4 0 0 2 6 5 5 0.0023 0.065 0.018 0.00039 0.2
B2M

Figure S1.  This figure depicts the distribution of mutations and mutation types across the B2M significant gene.

MYD88

Figure S2.  This figure depicts the distribution of mutations and mutation types across the MYD88 significant gene.

HLA-C

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

ZNF814

Figure S4.  This figure depicts the distribution of mutations and mutation types across the ZNF814 significant gene.

CD79B

Figure S5.  This figure depicts the distribution of mutations and mutation types across the CD79B significant gene.

TP53

Figure S6.  This figure depicts the distribution of mutations and mutation types across the TP53 significant gene.

TNFAIP3

Figure S7.  This figure depicts the distribution of mutations and mutation types across the TNFAIP3 significant gene.

C1orf127

Figure S8.  This figure depicts the distribution of mutations and mutation types across the C1orf127 significant gene.

APLF

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

RHPN2

Figure S10.  This figure depicts the distribution of mutations and mutation types across the RHPN2 significant gene.

CIITA

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

KDR

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

CARD11

Figure S13.  This figure depicts the distribution of mutations and mutation types across the CARD11 significant gene.

EZH2

Figure S14.  This figure depicts the distribution of mutations and mutation types across the EZH2 significant gene.

NFKBIE

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

MLH1

Figure S16.  This figure depicts the distribution of mutations and mutation types across the MLH1 significant gene.

FAS

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

ENOX1

Figure S18.  This figure depicts the distribution of mutations and mutation types across the ENOX1 significant gene.

SGK1

Figure S19.  This figure depicts the distribution of mutations and mutation types across the SGK1 significant gene.

IFITM3

Figure S20.  This figure depicts the distribution of mutations and mutation types across the IFITM3 significant gene.

APOB

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

MCM8

Figure S22.  This figure depicts the distribution of mutations and mutation types across the MCM8 significant gene.

ARID1A

Figure S23.  This figure depicts the distribution of mutations and mutation types across the ARID1A 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]

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