8  Reactome enrichment analysis

ReactomePA is designed for reactome pathway based analysis (Yu and He 2016). Reactome is an open-source, open access, manually curated and peer-reviewed pathway database.

8.1 Supported organisms

Currently ReactomePA supports several model organisms, including ‘celegans’, ‘fly’, ‘human’, ‘mouse’, ‘rat’, ‘yeast’ and ‘zebrafish’. The input gene ID should be Entrez gene ID. We recommend using clusterProfiler::bitr() to convert biological IDs.

8.2 Reactome pathway over-representation analysis

Enrichment analysis is a widely used approach to identify biological themes. ReactomePA implemented enrichPathway() that uses hypergeometric model to assess whether the number of selected genes associated with a reactome pathway is larger than expected.

library(ReactomePA)
data(geneList, package="DOSE"
)
de <- names(geneList)[abs(geneList) > 1.5]
head(de)
[1] "4312"  "8318"  "10874" "55143" "55388" "991"  
x <- enrichPathway(gene=de, pvalueCutoff = 0.05, readable=TRUE)
head(x)
                         ID
R-HSA-69620     R-HSA-69620
R-HSA-69618     R-HSA-69618
R-HSA-2500257 R-HSA-2500257
R-HSA-141424   R-HSA-141424
R-HSA-141444   R-HSA-141444
R-HSA-68882     R-HSA-68882
                                                                                       Description
R-HSA-69620                                                                 Cell Cycle Checkpoints
R-HSA-69618                                                             Mitotic Spindle Checkpoint
R-HSA-2500257                                              Resolution of Sister Chromatid Cohesion
R-HSA-141424                                         Amplification of signal from the kinetochores
R-HSA-141444  Amplification  of signal from unattached  kinetochores via a MAD2  inhibitory signal
R-HSA-68882                                                                       Mitotic Anaphase
              GeneRatio   BgRatio RichFactor FoldEnrichment oddsRatio    zScore
R-HSA-69620      38/342 292/11287  0.1301370       4.294901  5.261319 10.083502
R-HSA-69618      22/342 113/11287  0.1946903       6.425348  8.200137 10.245607
R-HSA-2500257    23/342 129/11287  0.1782946       5.884242  7.372597  9.862206
R-HSA-141424     20/342  96/11287  0.2083333       6.875609  8.882805 10.219491
R-HSA-141444     20/342  96/11287  0.2083333       6.875609  8.882805 10.219491
R-HSA-68882      28/342 225/11287  0.1244444       4.107031  4.865078  8.321376
                    pvalue     p.adjust       qvalue
R-HSA-69620   1.988463e-14 1.805524e-11 1.805524e-11
R-HSA-69618   2.386464e-12 1.083455e-09 1.083455e-09
R-HSA-2500257 5.135365e-12 1.182511e-09 1.182511e-09
R-HSA-141424  6.511625e-12 1.182511e-09 1.182511e-09
R-HSA-141444  6.511625e-12 1.182511e-09 1.182511e-09
R-HSA-68882   1.865374e-10 2.686794e-08 2.686794e-08
                                                                                                                                                                                                                                      geneID
R-HSA-69620   UBE2S/MCM2/ORC1/CDK1/BIRC5/CDC20/CDC6/SPC25/CDCA8/MCM5/ORC6/CENPI/KIF2C/AURKB/MCM10/CDC45/CCNE1/CCNB1/CCNA2/UBE2C/CENPN/ERCC6L/BUB1B/CDC25A/GTSE1/KIF18A/CENPE/TAOK1/SKA1/ZWINT/EXO1/CHEK1/PLK1/NDC80/CENPM/CCNB2/MAD2L1/CENPU
R-HSA-69618                                                                                             UBE2S/BIRC5/CDC20/SPC25/CDCA8/CENPI/KIF2C/AURKB/UBE2C/CENPN/ERCC6L/BUB1B/KIF18A/CENPE/TAOK1/SKA1/ZWINT/PLK1/NDC80/CENPM/MAD2L1/CENPU
R-HSA-2500257                                                                                      CDK1/BIRC5/CDC20/SPC25/CDCA8/CENPI/KIF2C/AURKB/CCNB1/CENPN/ERCC6L/BUB1B/KIF18A/CENPE/TAOK1/SKA1/ZWINT/PLK1/NDC80/CENPM/CCNB2/MAD2L1/CENPU
R-HSA-141424                                                                                                        BIRC5/CDC20/SPC25/CDCA8/CENPI/KIF2C/AURKB/CENPN/ERCC6L/BUB1B/KIF18A/CENPE/TAOK1/SKA1/ZWINT/PLK1/NDC80/CENPM/MAD2L1/CENPU
R-HSA-141444                                                                                                        BIRC5/CDC20/SPC25/CDCA8/CENPI/KIF2C/AURKB/CENPN/ERCC6L/BUB1B/KIF18A/CENPE/TAOK1/SKA1/ZWINT/PLK1/NDC80/CENPM/MAD2L1/CENPU
R-HSA-68882                                                          UBE2S/PTTG1/CDK1/BIRC5/CDC20/SPC25/CDCA8/CENPI/KIF2C/AURKB/CCNB1/LMNB1/UBE2C/CENPN/ERCC6L/BUB1B/KIF18A/CENPE/TAOK1/SKA1/ZWINT/PLK1/NDC80/CENPM/ESPL1/CCNB2/MAD2L1/CENPU
              Count
R-HSA-69620      38
R-HSA-69618      22
R-HSA-2500257    23
R-HSA-141424     20
R-HSA-141444     20
R-HSA-68882      28

8.3 Reactome pathway gene set enrichment analysis

y <- gsePathway(geneList, 
                pvalueCutoff = 0.2,
                pAdjustMethod = "BH", 
                verbose = FALSE)
head(y)
                         ID                          Description setSize
R-HSA-453279   R-HSA-453279 Mitotic G1 phase and G1/S transition     132
R-HSA-69206     R-HSA-69206                      G1/S Transition     114
R-HSA-69620     R-HSA-69620               Cell Cycle Checkpoints     238
R-HSA-69278     R-HSA-69278                  Cell Cycle, Mitotic     451
R-HSA-2555396 R-HSA-2555396       Mitotic Metaphase and Anaphase     190
R-HSA-69239     R-HSA-69239                     Synthesis of DNA      99
              enrichmentScore      NES pvalue     p.adjust       qvalue rank
R-HSA-453279        0.7117138 3.065288  1e-10 4.648571e-09 4.648571e-09 1155
R-HSA-69206         0.7163844 3.009853  1e-10 4.648571e-09 4.648571e-09 1155
R-HSA-69620         0.6508576 2.987239  1e-10 4.648571e-09 4.648571e-09 1905
R-HSA-69278         0.6094048 2.970349  1e-10 4.648571e-09 4.648571e-09 1769
R-HSA-2555396       0.6536752 2.960902  1e-10 4.648571e-09 4.648571e-09 1857
R-HSA-69239         0.7192759 2.959526  1e-10 4.648571e-09 4.648571e-09 1905
                                leading_edge
R-HSA-453279   tags=43%, list=9%, signal=40%
R-HSA-69206    tags=45%, list=9%, signal=41%
R-HSA-69620   tags=42%, list=15%, signal=36%
R-HSA-69278   tags=36%, list=14%, signal=32%
R-HSA-2555396 tags=41%, list=15%, signal=35%
R-HSA-69239   tags=57%, list=15%, signal=48%
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  core_enrichment
R-HSA-453279                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     8318/55388/4605/7153/6241/890/983/81620/891/4174/4171/993/990/7083/898/23594/4998/1163/9134/4175/4173/10926/6502/7298/4609/5111/28227/5688/5709/26271/51053/1869/1029/1719/4067/5693/8317/5427/23649/4176/5713/11047/5557/5691/1871/1031/5685/1019/5558/4172/5690/5684/5686/5695/7027/10213/1875
R-HSA-69206                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    8318/55388/6241/890/983/81620/891/4174/4171/993/990/7083/898/23594/4998/1163/9134/4175/4173/10926/6502/7298/4609/5111/28227/5688/5709/26271/51053/1869/1719/5693/8317/5427/23649/4176/5713/11047/5557/5691/5685/1019/5558/4172/5690/5684/5686/5695/7027/10213/1875
R-HSA-69620                                                                                                                                                                                                                                                                                                                                                                  8318/55143/55388/991/1062/9133/10403/11065/220134/79019/55839/27338/890/983/54821/4085/81930/332/9212/1111/891/4174/4171/11004/993/990/5347/701/51512/9156/11130/79682/57405/2491/898/23594/4998/9134/4175/4173/10926/5984/1058/699/1063/85236/5688/5709/55055/641/1029/1763/8970/5693/8317/4176/5713/79980/5982/9735/11047/2810/5691/9088/995/5685/7468/4172/7336/5690/5684/83990/5686/5695/11200/10213/8345/7534/80010/5983/7979/54908/6396/4683/63967/3018/5714/5702/3014/9978/5905/3619/5708/55166/5692/10393/8290/5704/580/6119
R-HSA-69278   8318/55143/55388/991/2305/9493/1062/4605/9133/10403/7153/23397/6241/11065/55355/220134/22974/4751/79019/55839/27338/890/983/54821/4085/9837/81930/81620/332/64151/9212/51659/10112/6790/891/4174/9232/4001/4171/3161/11004/993/990/5347/701/51512/11130/79682/57405/2491/9700/7083/898/23594/4998/10733/1163/54801/9134/4175/4173/2237/10926/6502/5984/994/9918/7298/1058/84296/699/4609/1063/85236/5111/28227/5688/9688/64785/5709/26271/55055/51053/1869/1029/1763/1719/8970/54892/8357/4067/5693/8317/7277/5427/23649/4176/7112/5713/3930/79980/5982/9735/55732/11047/5557/23310/5691/1871/1031/80086/9088/995/10051/1104/5685/84790/1019/5558/4172/9631/5424/7444/79866/5690/5684/5885/5686/5695/203068/7027/10213/1875/23175/8345/7283/10381/5983/7979/54908/10592/6396/23165/10383/3018/22822/5714/10376/7443/55706/8815/5702/3014/1030/23636/9978/5905/3619/5425/5708/55166/5692/10393/54107
R-HSA-2555396                                                                                                                                                                                                                                                                                                                                                                                                                                                                            55143/991/1062/9133/10403/11065/220134/79019/55839/27338/983/54821/4085/81930/332/9212/891/9232/4001/11004/5347/701/11130/79682/57405/2491/9700/1058/699/1063/5688/9688/5709/26271/55055/5693/7277/7112/5713/3930/79980/9735/11047/5691/80086/1104/5685/84790/9631/7444/5690/5684/5885/5686/5695/10213/10381/7979/54908/6396/23165/10383/5714/10376/7443/55706/8815/5702/23636/5905/3619/5708/55166/5692/10393/5704/5901
R-HSA-69239                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     8318/11065/27338/890/9837/81620/51659/4174/4171/990/898/23594/4998/9134/4175/4173/2237/6502/5984/84296/5111/5688/64785/5709/51053/1763/5693/5427/23649/4176/5713/5982/11047/5557/5691/5685/5558/4172/5424/5690/5684/5686/5695/10213/5983/7979/5714/5702/9978/5425/5708/5692/10393/54107/5704/6119
              log2err
R-HSA-453279      NaN
R-HSA-69206       NaN
R-HSA-69620       NaN
R-HSA-69278       NaN
R-HSA-2555396     NaN
R-HSA-69239       NaN

8.4 Pathway Visualization

ReactomePA implemented the viewPathway() to visualize selected reactome pathways. More general purpose visualization methods for ORA and GSEA results are provided in the enrichplot package and are documented in Chapter 14. See Figure 8.1 for an example.

viewPathway("E2F mediated regulation of DNA replication", 
            readable = TRUE, 
            foldChange = geneList)
Figure 8.1: Visualize reactome pathway.

References

Yu, Guangchuang, and Qing-Yu He. 2016. “ReactomePA: An r/Bioconductor Package for Reactome Pathway Analysis and Visualization.” Molecular BioSystems 12 (2): 477–79. https://doi.org/10.1039/C5MB00663E.