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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 101 to 157, in pages of 100, sorted by symbol for reading. The order carries no ranking.

Genes Reactome places in this human pathway, page 2 of 2
GeneMC5RAuthorityHGNC:6933Mapping file id4161 NCBI fileEvidenceTAS
GeneNPSAuthorityHGNC:33940Mapping file id594857 NCBI fileEvidenceTAS
GeneNPSR1AuthorityHGNC:23631Mapping file id387129 NCBI fileEvidenceTAS
GeneP2RY11AuthorityHGNC:8540Mapping file id5032 NCBI fileEvidenceTAS
GenePDE10AAuthorityHGNC:8772Mapping file id10846 NCBI fileEvidenceTAS
GenePDE11AAuthorityHGNC:8773Mapping file id50940 NCBI fileEvidenceTAS
GenePDE1AAuthorityHGNC:8774Mapping file id5136 NCBI fileEvidenceTAS
GenePDE1BAuthorityHGNC:8775Mapping file id5153 NCBI fileEvidenceTAS
GenePDE2AAuthorityHGNC:8777Mapping file id5138 NCBI fileEvidenceTAS
GenePDE3AAuthorityHGNC:8778Mapping file id5139 NCBI fileEvidenceTAS
GenePDE3BAuthorityHGNC:8779Mapping file id5140 NCBI fileEvidenceTAS
GenePDE4AAuthorityHGNC:8780Mapping file id5141 NCBI fileEvidenceTAS
GenePDE4CAuthorityHGNC:8782Mapping file id5143 NCBI fileEvidenceTAS
GenePDE4DAuthorityHGNC:8783Mapping file id5144 NCBI fileEvidenceTAS
GenePDE7AAuthorityHGNC:8791Mapping file id5150 NCBI fileEvidenceTAS
GenePDE7BAuthorityHGNC:8792Mapping file id27115 NCBI fileEvidenceTAS
GenePDE8AAuthorityHGNC:8793Mapping file id5151 NCBI fileEvidenceTAS
GenePDE8BAuthorityHGNC:8794Mapping file id8622 NCBI fileEvidenceTAS
GenePOMCAuthorityHGNC:9201Mapping file id5443 NCBI fileEvidenceTAS
GenePRKACAAuthorityHGNC:9380Mapping file id5566 NCBI fileEvidenceIEA, TAS
GenePRKACBAuthorityHGNC:9381Mapping file id5567 NCBI fileEvidenceIEA, TAS
GenePRKACGAuthorityHGNC:9382Mapping file id5568 NCBI fileEvidenceIEA, TAS
GenePRKAR1AAuthorityHGNC:9388Mapping file id5573 NCBI fileEvidenceTAS
GenePRKAR1BAuthorityHGNC:9390Mapping file id5575 NCBI fileEvidenceTAS
GenePRKAR2AAuthorityHGNC:9391Mapping file id5576 NCBI fileEvidenceTAS
GenePRKAR2BAuthorityHGNC:9392Mapping file id5577 NCBI fileEvidenceTAS
GenePTGDRAuthorityHGNC:9591Mapping file id5729 NCBI fileEvidenceTAS
GenePTGER2AuthorityHGNC:9594Mapping file id5732 NCBI fileEvidenceTAS
GenePTGER4AuthorityHGNC:9596Mapping file id5734 NCBI fileEvidenceTAS
GenePTGIRAuthorityHGNC:9602Mapping file id5739 NCBI fileEvidenceTAS
GenePTHAuthorityHGNC:9606Mapping file id5741 NCBI fileEvidenceTAS
GenePTH1RAuthorityHGNC:9608Mapping file id5745 NCBI fileEvidenceTAS
GenePTH2AuthorityHGNC:30828Mapping file id113091 NCBI fileEvidenceTAS
GenePTH2RAuthorityHGNC:9609Mapping file id5746 NCBI fileEvidenceTAS
GenePTHLHAuthorityHGNC:9607Mapping file id5744 NCBI fileEvidenceTAS
GeneRAMP1AuthorityHGNC:9843Mapping file id10267 NCBI fileEvidenceTAS
GeneRAMP2AuthorityHGNC:9844Mapping file id10266 NCBI fileEvidenceTAS
GeneRAMP3AuthorityHGNC:9845Mapping file id10268 NCBI fileEvidenceTAS
GeneRLN2AuthorityHGNC:10027Mapping file id6019 NCBI fileEvidenceTAS
GeneRLN3AuthorityHGNC:17135Mapping file id117579 NCBI fileEvidenceTAS
GeneRXFP1AuthorityHGNC:19718Mapping file id59350 NCBI fileEvidenceTAS
GeneRXFP2AuthorityHGNC:17318Mapping file id122042 NCBI fileEvidenceTAS
GeneSCTAuthorityHGNC:10607Mapping file id6343 NCBI fileEvidenceTAS
GeneSCTRAuthorityHGNC:10608Mapping file id6344 NCBI fileEvidenceTAS
GeneSHC1AuthorityHGNC:10840Mapping file id6464 NCBI fileEvidenceTAS
GeneSRCAuthorityHGNC:11283Mapping file id6714 NCBI fileEvidenceTAS
GeneTAAR1AuthorityHGNC:17734Mapping file id134864 NCBI fileEvidenceTAS
GeneTAAR2AuthorityHGNC:4514Mapping file id9287 NCBI fileEvidenceTAS
GeneTAAR5AuthorityHGNC:30236Mapping file id9038 NCBI fileEvidenceTAS
GeneTAAR6AuthorityHGNC:20978Mapping file id319100 NCBI fileEvidenceTAS
GeneTAAR8AuthorityHGNC:14964Mapping file id83551 NCBI fileEvidenceTAS
GeneTAAR9AuthorityHGNC:20977Mapping file id134860 NCBI fileEvidenceTAS
GeneTSHBAuthorityHGNC:12372Mapping file id7252 NCBI fileEvidenceTAS
GeneTSHRAuthorityHGNC:12373Mapping file id7253 NCBI fileEvidenceTAS
GeneVIPAuthorityHGNC:12693Mapping file id7432 NCBI fileEvidenceTAS
GeneVIPR1AuthorityHGNC:12694Mapping file id7433 NCBI fileEvidenceTAS
GeneVIPR2AuthorityHGNC:12695Mapping file id7434 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.