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Pathway Human Homo sapiens

G alpha (s) signalling events

R-HSA-418555 in Reactome release 97: under GPCR downstream signalling, with 157 genes placed in it by the mapping files and 1 child pathway in the hierarchy.

The same number in the other species

Reactome writes the mouse and rat events it infers from a human pathway under the human number with the species token. A door opens only where that species' own list in this release holds the id: R-MMU-418555 (mouse), R-RNO-418555 (rat). Whether the event was inferred from this one is what the record says.

01The record

Reactome's own record of this pathway

What this tells you

The pathway list, the hierarchy and the genes on this page are read from the files Reactome publishes for Reactome release 97, built into this site on 2026-09-09: the pathway list, the hierarchy relationship file and the two gene mapping files. The record card is the one live read, Reactome's own record of this pathway.

Reactome's download page describes the mapping files: Mapping files link the source database identifier to the lowest level pathway diagram or subset of the pathway, all levels of the pathway hierarchy or database identifier to all reactions. [R13] The gene list here is the all-levels mapping of NCBI Gene ids, filled from the all-levels mapping of Ensembl ids where the NCBI file has no row for a gene; each row names which file it came from by the shape of its source id. Each row carries the evidence codes the file writes for it, as written and unranked, and both where the file writes both; no page of Reactome's documentation the survey read defines the codes, so this page does not expand them. A gene id the identity files do not name is kept as the source's own id with no door rather than turned into a symbol.

On citing what a search finds, Reactome says: It should be remembered that while we strive to contain the most current and accurate data, Reactome should not be used in citations where other primary sources of information are available. [R12] The record card prints the literature Reactome attaches to a curated pathway for that reason. The data are public domain: All data in the Reactome database and files derived from that data are licensed under the Creative Commons Public Domain Dedication (CC0). User may copy, modify, and distribute these data, even for commercial purposes, without asking for permission. Attribution is encouraged but not required. [R10] The pathway illustrations are licensed apart, under CC BY 4.0, and none is shown here.

A gene on this list is one Reactome places in this pathway in this release, and that is all the row says: it does not say the gene is expressed in a tissue or associated with a disease, which are the other two explorers' questions, read from other sources. Reactome's papers of record are [R01] [R02].

  1. [R01] Ragueneau E, Gong C, Sinquin P, Sevilla C, Beavers D, Grentner A, et al. (2026). The Reactome Knowledgebase 2026. Nucleic Acids Research 54:D673-D681. PMID 41251150, doi 10.1093/nar/gkaf1223.
  2. [R02] Milacic M, Beavers D, Conley P, Gong C, Gillespie M, Griss J, et al. (2024). The Reactome Pathway Knowledgebase 2024. Nucleic Acids Research 52:D672-D678. PMID 37941124, doi 10.1093/nar/gkad1025.
  3. [R10] Reactome, reactome.org. License Agreement. https://reactome.org/license, read 2026-09-09.
  4. [R12] Reactome, reactome.org. Citing us. https://reactome.org/cite, read 2026-09-09.
  5. [R13] Reactome, reactome.org. Download. https://reactome.org/download-data, read 2026-09-09.
Reading this pathway's record from Reactome (the pathway record).Still reading. A first read of a pathway can take a while; this page waits up to 35 seconds for it, and its scripts then bring in the panel, or a line saying what did not arrive.

02The genes

Genes Reactome places in this human pathway

The mapping files place 157 genes in this human pathway; showing 1 to 100, in pages of 100, sorted by symbol for reading. The order carries no ranking.

Genes Reactome places in this human pathway, page 1 of 2
GeneADCY1AuthorityHGNC:232Mapping file id107 NCBI fileEvidenceIEA, TAS
GeneADCY2AuthorityHGNC:233Mapping file id108 NCBI fileEvidenceIEA, TAS
GeneADCY3AuthorityHGNC:234Mapping file id109 NCBI fileEvidenceIEA, TAS
GeneADCY4AuthorityHGNC:235Mapping file id196883 NCBI fileEvidenceIEA, TAS
GeneADCY5AuthorityHGNC:236Mapping file id111 NCBI fileEvidenceIEA, TAS
GeneADCY6AuthorityHGNC:237Mapping file id112 NCBI fileEvidenceIEA, TAS
GeneADCY7AuthorityHGNC:238Mapping file id113 NCBI fileEvidenceIEA, TAS
GeneADCY8AuthorityHGNC:239Mapping file id114 NCBI fileEvidenceIEA, TAS
GeneADCY9AuthorityHGNC:240Mapping file id115 NCBI fileEvidenceIEA, TAS
GeneADCYAP1AuthorityHGNC:241Mapping file id116 NCBI fileEvidenceTAS
GeneADCYAP1R1AuthorityHGNC:242Mapping file id117 NCBI fileEvidenceTAS
GeneADMAuthorityHGNC:259Mapping file id133 NCBI fileEvidenceTAS
GeneADM2AuthorityHGNC:28898Mapping file id79924 NCBI fileEvidenceTAS
GeneADORA2AAuthorityHGNC:263Mapping file id135 NCBI fileEvidenceTAS
GeneADORA2BAuthorityHGNC:264Mapping file id136 NCBI fileEvidenceTAS
GeneADRB1AuthorityHGNC:285Mapping file id153 NCBI fileEvidenceTAS
GeneADRB2AuthorityHGNC:286Mapping file id154 NCBI fileEvidenceTAS
GeneADRB3AuthorityHGNC:288Mapping file id155 NCBI fileEvidenceTAS
GeneARRB1AuthorityHGNC:711Mapping file id408 NCBI fileEvidenceTAS
GeneARRB2AuthorityHGNC:712Mapping file id409 NCBI fileEvidenceTAS
GeneAVPAuthorityHGNC:894Mapping file id551 NCBI fileEvidenceTAS
GeneAVPR2AuthorityHGNC:897Mapping file id554 NCBI fileEvidenceTAS
GeneCALCAAuthorityHGNC:1437Mapping file id796 NCBI fileEvidenceTAS
GeneCALCBAuthorityHGNC:1438Mapping file id797 NCBI fileEvidenceTAS
GeneCALCRAuthorityHGNC:1440Mapping file id799 NCBI fileEvidenceTAS
GeneCALCRLAuthorityHGNC:16709Mapping file id10203 NCBI fileEvidenceTAS
GeneCGAAuthorityHGNC:1885Mapping file id1081 NCBI fileEvidenceTAS
GeneCRHAuthorityHGNC:2355Mapping file id1392 NCBI fileEvidenceTAS
GeneCRHR1AuthorityHGNC:2357Mapping file id1394 NCBI fileEvidenceTAS
GeneCRHR2AuthorityHGNC:2358Mapping file id1395 NCBI fileEvidenceTAS
GeneCYSLTR2AuthorityHGNC:18274Mapping file id57105 NCBI fileEvidenceTAS
GeneDRD1AuthorityHGNC:3020Mapping file id1812 NCBI fileEvidenceTAS
GeneDRD5AuthorityHGNC:3026Mapping file id1816 NCBI fileEvidenceTAS
GeneFN1AuthorityHGNC:3778Mapping file id2335 NCBI fileEvidenceTAS
GeneFSHBAuthorityHGNC:3964Mapping file id2488 NCBI fileEvidenceTAS
GeneFSHRAuthorityHGNC:3969Mapping file id2492 NCBI fileEvidenceTAS
GeneGCGAuthorityHGNC:4191Mapping file id2641 NCBI fileEvidenceTAS
GeneGCGRAuthorityHGNC:4192Mapping file id2642 NCBI fileEvidenceTAS
GeneGHRHAuthorityHGNC:4265Mapping file id2691 NCBI fileEvidenceTAS
GeneGHRHRAuthorityHGNC:4266Mapping file id2692 NCBI fileEvidenceTAS
GeneGIPAuthorityHGNC:4270Mapping file id2695 NCBI fileEvidenceTAS
GeneGIPRAuthorityHGNC:4271Mapping file id2696 NCBI fileEvidenceTAS
GeneGLP1RAuthorityHGNC:4324Mapping file id2740 NCBI fileEvidenceTAS
GeneGLP2RAuthorityHGNC:4325Mapping file id9340 NCBI fileEvidenceTAS
GeneGNAI1AuthorityHGNC:4384Mapping file id2770 NCBI fileEvidenceIEA
GeneGNAI2AuthorityHGNC:4385Mapping file id2771 NCBI fileEvidenceIEA
GeneGNAI3AuthorityHGNC:4387Mapping file id2773 NCBI fileEvidenceIEA
GeneGNASAuthorityHGNC:4392Mapping file id2778 NCBI fileEvidenceIEA, TAS
GeneGNAT3AuthorityHGNC:22800Mapping file id346562 NCBI fileEvidenceIEA
GeneGNAZAuthorityHGNC:4395Mapping file id2781 NCBI fileEvidenceIEA
GeneGNB1AuthorityHGNC:4396Mapping file id2782 NCBI fileEvidenceTAS
GeneGNB2AuthorityHGNC:4398Mapping file id2783 NCBI fileEvidenceTAS
GeneGNB3AuthorityHGNC:4400Mapping file id2784 NCBI fileEvidenceTAS
GeneGNB4AuthorityHGNC:20731Mapping file id59345 NCBI fileEvidenceTAS
GeneGNB5AuthorityHGNC:4401Mapping file id10681 NCBI fileEvidenceTAS
GeneGNG10AuthorityHGNC:4402Mapping file id2790 NCBI fileEvidenceTAS
GeneGNG11AuthorityHGNC:4403Mapping file id2791 NCBI fileEvidenceTAS
GeneGNG12AuthorityHGNC:19663Mapping file id55970 NCBI fileEvidenceTAS
GeneGNG13AuthorityHGNC:14131Mapping file id51764 NCBI fileEvidenceTAS
GeneGNG2AuthorityHGNC:4404Mapping file id54331 NCBI fileEvidenceTAS
GeneGNG3AuthorityHGNC:4405Mapping file id2785 NCBI fileEvidenceTAS
GeneGNG4AuthorityHGNC:4407Mapping file id2786 NCBI fileEvidenceTAS
GeneGNG5AuthorityHGNC:4408Mapping file id2787 NCBI fileEvidenceTAS
GeneGNG7AuthorityHGNC:4410Mapping file id2788 NCBI fileEvidenceTAS
GeneGNG8AuthorityHGNC:19664Mapping file id94235 NCBI fileEvidenceTAS
GeneGNGT1AuthorityHGNC:4411Mapping file id2792 NCBI fileEvidenceTAS
GeneGNGT2AuthorityHGNC:4412Mapping file id2793 NCBI fileEvidenceTAS
GeneGPBAR1AuthorityHGNC:19680Mapping file id151306 NCBI fileEvidenceTAS
GeneGPER1AuthorityHGNC:4485Mapping file id2852 NCBI fileEvidenceTAS
GeneGPHA2AuthorityHGNC:18054Mapping file id170589 NCBI fileEvidenceTAS
GeneGPHB5AuthorityHGNC:18055Mapping file id122876 NCBI fileEvidenceTAS
GeneGPR15AuthorityHGNC:4469Mapping file id2838 NCBI fileEvidenceTAS
GeneGPR150AuthorityHGNC:23628Mapping file id285601 NCBI fileEvidenceTAS
GeneGPR176AuthorityHGNC:32370Mapping file id11245 NCBI fileEvidenceTAS
GeneGPR20AuthorityHGNC:4475Mapping file id2843 NCBI fileEvidenceTAS
GeneGPR25AuthorityHGNC:4480Mapping file id2848 NCBI fileEvidenceTAS
GeneGPR27AuthorityHGNC:4482Mapping file id2850 NCBI fileEvidenceTAS
GeneGPR32AuthorityHGNC:4487Mapping file id2854 NCBI fileEvidenceTAS
GeneGPR39AuthorityHGNC:4496Mapping file id2863 NCBI fileEvidenceTAS
GeneGPR45AuthorityHGNC:4503Mapping file id11250 NCBI fileEvidenceTAS
GeneGPR83AuthorityHGNC:4523Mapping file id10888 NCBI fileEvidenceTAS
GeneGPR84AuthorityHGNC:4535Mapping file id53831 NCBI fileEvidenceTAS
GeneGRK2AuthorityHGNC:289Mapping file id156 NCBI fileEvidenceTAS
GeneGRK3AuthorityHGNC:290Mapping file id157 NCBI fileEvidenceTAS
GeneGRK5AuthorityHGNC:4544Mapping file id2869 NCBI fileEvidenceTAS
GeneGRK6AuthorityHGNC:4545Mapping file id2870 NCBI fileEvidenceTAS
GeneHRH2AuthorityHGNC:5183Mapping file id3274 NCBI fileEvidenceTAS
GeneHTR4AuthorityHGNC:5299Mapping file id3360 NCBI fileEvidenceTAS
GeneHTR6AuthorityHGNC:5301Mapping file id3362 NCBI fileEvidenceTAS
GeneHTR7AuthorityHGNC:5302Mapping file id3363 NCBI fileEvidenceTAS
GeneIAPPAuthorityHGNC:5329Mapping file id3375 NCBI fileEvidenceTAS
GeneINSL3AuthorityHGNC:6086Mapping file id3640 NCBI fileEvidenceTAS
GeneITGA5AuthorityHGNC:6141Mapping file id3678 NCBI fileEvidenceTAS
GeneITGB1AuthorityHGNC:6153Mapping file id3688 NCBI fileEvidenceTAS
GeneLHBAuthorityHGNC:6584Mapping file id3972 NCBI fileEvidenceTAS
GeneLHCGRAuthorityHGNC:6585Mapping file id3973 NCBI fileEvidenceTAS
GeneMC1RAuthorityHGNC:6929Mapping file id4157 NCBI fileEvidenceTAS
GeneMC2RAuthorityHGNC:6930Mapping file id4158 NCBI fileEvidenceTAS
GeneMC3RAuthorityHGNC:6931Mapping file id4159 NCBI fileEvidenceTAS
GeneMC4RAuthorityHGNC:6932Mapping file id4160 NCBI fileEvidenceTAS

Evidence codes on this page: IEA, TAS, as the mapping file writes them; a row carrying two was written twice by the file, once under each. The mapping file id says which file placed the gene: an NCBI Gene id from NCBI2Reactome_All_Levels.txt, an Ensembl gene id from Ensembl2Reactome_All_Levels.txt. The two files can disagree about a code, so a row's codes are the one file's view. Measured by this site's build over this release on 2026-09-09: of the 138,908 human pathway-gene pairs both files place, 207 (0.149 per cent, over 47 genes) carry TAS in the Ensembl file where the NCBI rows carry IEA alone.

  • Reactome mapping files, the human rows for this pathway · Reactome release 97 · read · Reactome downloads"NCBI2Reactome_All_Levels.txt" and "Ensembl2Reactome_All_Levels.txt", Reactome, release 97, https://reactome.org/download-data/ (date of access 2026-09-09). Data CC0; attribution encouraged.

03The hierarchy

Parents and children in this release's hierarchy

Reactome's hierarchy is a graph rather than a tree: a pathway can sit under more than one parent, and the gene counts are each pathway's own placements at every level under it, so a parent's count is not the sum of its children's.

  • Reactome, the human pathway list and hierarchy relationship file · Reactome release 97 · read · Reactome downloads"ReactomePathways.txt" and "ReactomePathwaysRelation.txt", Reactome, release 97, https://reactome.org/download-data/ (date of access 2026-09-09). Data CC0; attribution encouraged.