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PIK3R1
HPA
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ipTM
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  • SUMMARY

  • TISSUE

  • BRAIN

  • SINGLE CELL

  • SUBCELL

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  • BLOOD

  • CELL LINE

  • STRUCTURE

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  • PIK3R1
INTERACTION INTERACTION METABOLIC PATHWAYS Show tissue menu
INOSITOL PHOSPHATE METABOLISM
Protein interactions
Protein interactions
Methods
Human metabolism
Metabolic proteins
Methods
GENERAL INFORMATIONi

General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.

Gene namei

Official gene symbol, which is typically a short form of the gene name, according to HGNC.

PIK3R1
Synonyms GRB1, p85, p85-ALPHA
Gene descriptioni

Full gene name according to HGNC.

Phosphoinositide-3-kinase regulatory subunit 1
Protein classi

Assigned HPA protein class(es) for the encoded protein(s).

Read more
Cancer-related genes
Disease related genes
Human disease related genes
Metabolic proteins
Plasma proteins
RAS pathway related proteins
Predicted locationi

All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.

  • Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.
  • Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).

The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.

Intracellular
Protein evidence Evidence at protein level (all genes)

HUMAN PROTEIN ATLAS INFORMATIONi

Summary of RNA expression analysis and annotation data generated within the Human Protein Atlas project.

Single cell type
expression clusteri

The RNA data was used to cluster genes according to their expression across single cell types. Clusters contain genes that have similar expression patterns, and each cluster has been manually annotated to describe common features in terms of function and specificity.

NK-cells & T-cells - Adaptive immunity: Cytotoxicity (mainly)
Single cell type specificityi

The RNA specificity category is based on mRNA expression levels in the analyzed cell types based on scRNA-seq data from normal tissues. The categories include: cell type enriched, group enriched, cell type enhanced, low cell type specificity and not detected.

Cell type enhanced (NK-cells, Oligodendrocyte progenitor cells, Schwann cells, Thymic myoid cells)
Tissue expression
cluster (RNA)i

The RNA data was used to cluster genes according to their expression across tissues. Clusters contain genes that have similar expression patterns, and each cluster has been manually annotated to describe common features in terms of function and specificity.

Non-specific - Basic cellular processes (mainly)
Tissue specificity (RNA)i

The RNA specificity category is based on mRNA expression levels in the consensus dataset which is calculated from the RNA expression levels in samples from HPA and GTEX. The categories include: tissue enriched, group enriched, tissue enhanced, low tissue specificity and not detected.

Low tissue specificity
Subcellular locationi

Main subcellular location based on data generated in the subcellular section of the Human Protein Atlas.

Localized to the Cytosol
Secretome annotationi

All genes with at least one predicted secreted isoform have been annotated and classified with the aim to determine if the corresponding protein(s) are:

  • secreted into blood
  • locally secreted
  • or actually being attached to membrane or retained in intracellular locations like mitochondria, endoplasmatic reticulum (ER), Golgi apparatus or lysosomes.
Not available
GENE INFORMATIONi

Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.

Chromosome 5
Cytoband q13.1
Chromosome location (bp) 68215740 - 68301821
Number of transcriptsi

Number of protein-coding transcripts from the gene as defined by Ensembl.

24
Ensembl ENSG00000145675 (version 109)
Entrez gene 5295
HGNC HGNC:8979
UniProt P27986
GeneCards PIK3R1
ASSAYSi

Links to data of the different assays available in the Structure & Interaction resource of the Human Protein Atlas. Click on the miniature images to directly get to the respective section.

Interaction Metabolic
INTERACTIONi

In the Interaction part of this page network plots showing the gene's first-level interaction partners according to four different datasets are displayed, including a consensus network plot showing only interactions present in at least two of the datasets. By clicking on nodes the network can be expanded. In the network plots the nodes represent genes and edge color represent the number of datasets the interaction belongs to. In-house generated AlphaFold 3 predicted 3D structures for interactions in the consensus network are displayed by clicking on the blue symbols on the edges.

The highlight bar in the top of the plot can be used to color the nodes according to subcellular location (based on data in the Subcellular section), predicted location (based on signalpeptide and transmembrane region predictions), tissue specificity (based on RNA tissue expression profiles) or proteinclass. For genes categorised as single cell type or group specific the option to highlight interaction partners expressed in the same cell type will also be available in the highlight bar.

Custom highlighting of nodes is possible using the top left Filter option in which a query of choice can be built to for example label all nodes that are tissue enriched in both human and mouse brain or those that belongs to a certain tissue expression cluster. The expression cluster for the gene is stated in the box Human Protein Atlas Information above the network plot. Click on Filter in the top left in the plot to find the query builder and some example queries.

Interactions included are direct interaction and physical associations with high and medium confidence from IntAct, physical multivalidated interactions from BioGRID, interactions with>75% probability from BioPlex and significant physical interactions from OpenCell.

Filter menu »
Fields »
e.g. Brain enriched, Localized to mitochondria, Non-specific - Basic cellular processes

Field
Term
Gene name
Class
Subclass
Category
Keyword
Chromosome
External id
Tissue
Cell type
Expression
Antibody panel
Tissue
Main location
Patient ID
Annotation
Tissue
Category
Tau score
Cluster
Reliability
Brain region
Category
Tau score
Brain region
Category
Tau score
Brain region
Category
Tau score
Cluster
Reliability
Tissue
Cell type
Enrichment
Cell type
Category
Tau score
Cell type group
Category
Tau score
Cell type
Category
Tau score
Cell type
Category
Tau score
Cell lineage
Category
Tau score
Cluster
Cluster
Location
Searches
Location
Cell line
Class
Type
Phase
Reliability
Cancer
Prognosis
Cancer
Category
Cancer
Category
Tau score
Cluster
Variants
Interacting gene (ensg_id)
Type
Number of interactions
Pathway
ipTM
Category
Category
Category
Category
Validation
Validation
Validation
Validation
Antibodies
Data type
Column


Consensus
IntAct
BioGrid
OpenCell
BioPlex
Highlight:
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Subcell location
Predicted location
Cell type specificity
Protein class

Non-commercial use only, subject to AlphaFold3 Output Terms of Use

Interaction:
Color scheme:
Confidence
Antibodies
Interactor
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PAE plot
Number of interactions: 27
Interaction# Consensus# IntAct# BioGrid# OpenCell# BioPlex
CBL313613130
CRKL14245010
EGFR18727545806
ERBB2325012000
ERBB315236301
FLT1361200
GAB17112510
GAB2891730
GRB28216620635
IGF1R162373115
INSR161854016
IRS1694300
IRS2882000
KIT772800
NISCH2212417
PDGFRB6223300
PIK3CA6112431
PIK3CB371102
PIK3CD22511
PIK3R213223694
PIK3R327724113
SHC114188600
SOS111162511
SRC295713400
SSTR213300
SYK8164000
WDR62221714
Show allShow less
Highlight:
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Subcell location
Predicted location
Cell type specificity
Protein class

Number of interactions: 44 View all protein interaction data in IntAct
Interaction# Consensus# IntAct# BioGrid# OpenCell# BioPlex
ARAF191665114
BRAF171134301
CBL313613130
CDC423033160151
CHAF1A162341611
CMIP01100
CRKL14245010
EGFR18727545806
ELK329400
EPHA1016013
ERBB2325012000
ERBB315236301
FASLG10282103
FLT1361200
GAB17112510
GAB2891730
GRB28216620635
HTT366665600
ICOS13100
IGF1R162373115
INSR161854016
IRS1694300
IRS2882000
KIR2DL113100
KIT772800
MAL068000
MAPK810126540
NISCH2212417
PDGFRB6223300
PIK3CA6112431
PIK3CB371102
PIK3CD22511
PIK3R213223694
PLCG23131100
RXRA10135000
SHC114188600
SOS111162511
SRC295713400
SSTR213300
SYK8164000
TGOLN20310200
TIRAP9111200
TLR304800
YWHAG25427143322213
Show allShow less
Highlight:
Off
Subcell location
Predicted location
Cell type specificity
Protein class

Number of interactions: 112
Interaction# Consensus# IntAct# BioGrid# OpenCell# BioPlex
ABI1111329100
ABL126349570
ADAM1205500
AGAP2011000
AKT15314319724
ALK1510300
APPL1153433206
AXL242000
BCAR1192144122
BCR444130
BRCA1363931130
BRD7111442150
CBL313613130
CBLB6262500
CD1900700
CD24725903
CD2800500
CD3E3611018
CD7122012
CRK31547300
CRKL14245010
CSF1R231400
CTNNB147852851313
CUL3404577120
DAB2IP111400
DOK1231700
EGF12300
EGFR18727545806
EPHA2101110205
EPOR241400
ERBB2325012000
ERBB315236301
ESR1345947900
EZR8188954
FBXO2122800
FCGR2A01300
FGFR112136800
FGFR2572200
FLT1361200
FYN21516900
GAB17112510
GAB2891730
GP1BA13600
GRB28216620635
HRAS1491135010
IGF1R162373115
IL1R133700
INPP5D191400
INSR161854016
IRS1694300
IRS2882000
IRS4246700
ITSN115143540
JAK2353600
KBTBD200200
KHDRBS1172265150
KIT772800
LAMP181193471
LAT561800
LCK16294000
LCP27161600
LTK123400
LZTS2211784647
MAPT111918800
NISCH2212417
NLRP600900
NTRK15613400
NTRK2232000
NYAP212300
PDGFB241100
PDGFRA452700
PDGFRB6223300
PFKP144000
PIK3CA6112431
PIK3CB371102
PIK3CD22511
PIK3R213223694
PIK3R327724113
PROM111500
PTEN111813000
PTK219256510
PTPN1119308200
PTPN612206400
PXN13116140
RAC13361111150
RACK156991442081
RASD201301
RET464300
RHOB3230811
RNF43563500
SH2D2A7181800
SH3KBP121357010
SHB111100
SHC114188600
SLC31A15015323
SOCS1356000
SOS111162511
SQSTM1324031220
SRC295713400
SSTR213300
SYK8164000
TGFBR1234310
TGFBR235424013
TNK27123601
TRIM253319000
TUBA1B224494613
TYRO3113901
VAV1673700
WAS7153000
WDR62221714
YWHAZ2221643483248
ZDHHC17273249018
Show allShow less
Highlight:
Off
Subcell location
Predicted location
Cell type specificity
Protein class

Number of interactions: 7
Interaction# Consensus# IntAct# BioGrid# OpenCell# BioPlex
NISCH2212417
PIK3CA6112431
PIK3CD22511
PIK3R213223694
PIK3R327724113
PPP5C13162661
WDR62221714
PIK3R1 has no defined protein interactions in BioPlex.
METABOLIC SUMMARYi

In this summary the pathway/subsystems to which the gene belongs is shown together with the associated cellular compartment for the reactions based on metabolite information. The number of proteins and metabolites in the pathway is shown as well as the number of reactions for the selected gene. By clicking on a pathway in the summary table the associated metabolic network map is shown, together with a gene-tissue heatmap that shows the expression of genes in that pathway in different tissues.

Gene PIK3R1 is associated with 1 reactions in 1 different subsystems, and present in the compartments: Cytosol. Provided by metabolicatlas.org
Pathway / Subsystem Subsystem-associated compartments # proteins # metabolites # reactions for
this protein
Inositol phosphate metabolism Cytosol, Nucleus, Endoplasmic reticulum, Golgi apparatus 101 36 1
PROTEIN INFORMATIONi

The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.

The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.

The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.

The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.

Splice variant SwissProt TrEMBL Protein class Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
PIK3R1-201 P27986
Metabolic proteins
Predicted intracellular proteins
Plasma proteins
RAS pathway related proteins
Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
424 aa
50 kDa
No 0
PIK3R1-202 P27986
Metabolic proteins
Predicted intracellular proteins
Plasma proteins
RAS pathway related proteins
Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
454 aa
53.5 kDa
No 0
PIK3R1-204 A0A2X0SFG1
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
724 aa
83.6 kDa
No 0
PIK3R1-208 H0YBC2
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
153 aa
18.4 kDa
No 0
PIK3R1-210 H0YB27
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
54 aa
6.1 kDa
No 0
PIK3R1-211 P27986
A0A2X0SFG1
Metabolic proteins
Predicted intracellular proteins
Plasma proteins
RAS pathway related proteins
Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
724 aa
83.6 kDa
No 0
PIK3R1-212 E5RJY0
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
137 aa
16.3 kDa
No 0
PIK3R1-213 P27986
A0A2X0SFG1
Metabolic proteins
Predicted intracellular proteins
Plasma proteins
RAS pathway related proteins
Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Protein evidence (Ezkurdia et al 2014)
Show all
724 aa
83.6 kDa
No 0
PIK3R1-214 E5RHI0
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
454 aa
53.3 kDa
No 0
PIK3R1-215 E5RGI8
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
117 aa
13.3 kDa
No 0
PIK3R1-216 P27986
Metabolic proteins
Predicted intracellular proteins
Plasma proteins
RAS pathway related proteins
Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Protein evidence (Ezkurdia et al 2014)
Show all
361 aa
42.8 kDa
No 0
PIK3R1-217
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
699 aa
80.8 kDa
No 0
PIK3R1-218 A0A2X0SFG1
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
724 aa
83.6 kDa
No 0
PIK3R1-220
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
549 aa
64.3 kDa
No 0
PIK3R1-221
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
732 aa
84.5 kDa
No 0
PIK3R1-222
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
462 aa
54.4 kDa
No 0
PIK3R1-225 B3KWZ7
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
403 aa
47.7 kDa
No 0
PIK3R1-226
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
393 aa
46.3 kDa
No 0
PIK3R1-227
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
361 aa
42.8 kDa
No 0
PIK3R1-228
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
385 aa
45.5 kDa
No 0
PIK3R1-229
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
231 aa
27.9 kDa
No 0
PIK3R1-230
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
235 aa
28.3 kDa
No 0
PIK3R1-232
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
406 aa
46 kDa
No 0
PIK3R1-233
Metabolic proteins
Predicted intracellular proteins
RAS pathway related proteins
Cancer-related genes
Human disease related genes
Protein evidence (Ezkurdia et al 2014)
Show all
385 aa
45.5 kDa
No 0
Show allShow less

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