Show Nav →
Please include the following statement when referencing the CPTAC Assay Portal
We would like to acknowledge the National Cancer Institute’s Clinical Proteomic Tumor Analysis Consortium (CPTAC) Assay Portal (assays.cancer.gov) for developing assays and establishing criteria for the assays described in this publication.

PIK3R1

Previous Assay Next Assay
Available Assays

Overview Data source: UniProt

Official Gene Symbol Other Aliases
PIK3R1 GRB1
Sequence Length (AA) Molecular Weight (Da)
724 83598
Protein Name
Phosphatidylinositol 3-kinase regulatory subunit alpha
Sources
UniProt
PhosphoSitePlus ®
GeneCards 		Human Protein Atlas

Protein Sequence hover to view complete sequence

10 20 30 40 50
MSAEGYQYRA LYDYKKEREE DIDLHLGDIL TVNKGSLVAL GFSDGQEARP
60 70 80 90 100
EEIGWLNGYN ETTGERGDFP GTYVEYIGRK KISPPTPKPR PPRPLPVAPG
110 120 130 140 150
SSKTEADVEQ QALTLPDLAE QFAPPDIAPP LLIKLVEAIE KKGLECSTLY
160 170 180 190 200
RTQSSSNLAE LRQLLDCDTP SVDLEMIDVH VLADAFKRYL LDLPNPVIPA
210 220 230 240 250
AVYSEMISLA PEVQSSEEYI QLLKKLIRSP SIPHQYWLTL QYLLKHFFKL
260 270 280 290 300
SQTSSKNLLN ARVLSEIFSP MLFRFSAASS DNTENLIKVI EILISTEWNE
310 320 330 340 350
RQPAPALPPK PPKPTTVANN GMNNNMSLQD AEWYWGDISR EEVNEKLRDT
360 370 380 390 400
ADGTFLVRDA STKMHGDYTL TLRKGGNNKL IKIFHRDGKY GFSDPLTFSS
410 420 430 440 450
VVELINHYRN ESLAQYNPKL DVKLLYPVSK YQQDQVVKED NIEAVGKKLH
460 470 480 490 500
EYNTQFQEKS REYDRLYEEY TRTSQEIQMK RTAIEAFNET IKIFEEQCQT
510 520 530 540 550
QERYSKEYIE KFKREGNEKE IQRIMHNYDK LKSRISEIID SRRRLEEDLK
560 570 580 590 600
KQAAEYREID KRMNSIKPDL IQLRKTRDQY LMWLTQKGVR QKKLNEWLGN
610 620 630 640 650
ENTEDQYSLV EDDEDLPHHD EKTWNVGSSN RNKAENLLRG KRDGTFLVRE
660 670 680 690 700
SSKQGCYACS VVVDGEVKHC VINKTATGYG FAEPYNLYSS LKELVLHYQH
710 720 724
TSLVQHNDSL NVTLAYPVYA QQRR

Data source: UniProt

Protein Map Collapse protein map

Position of Targeted Peptide Analytes Relative to SNPs, Isoforms, and PTMs

Uniprot Database Entry PhosphoSitePlus ®

Click a point on a node
to view detailed assay information below
All other points link out to UniProt


Phosphorylation Acetylation Ubiquitylation Other

loading

Loader

Assay Details for CPTAC-1539 Collapse assay details

Data source: Panorama

Official Gene Symbol
PIK3R1
Peptide Sequence
FSAASSDNTENLIK
Modification Type
unmodified
Protein - Site of Modification
N/A
Peptide - Site of Modification
N/A
Peptide Start
275
Peptide End
288
CPTAC ID
CPTAC-1539
Peptide Molecular Mass
1,495.7155
Species
Homo sapiens (Human)
Assay Type
Direct MRM or SRM
Matrix
Ovarian cancer tumor tissue lysate
Submitting Laboratory
Pacific Northwest National Laboratory
Submitting Lab PI
Tao Liu

Assay Parameters Collapse assay parameters

Data source: Panorama

Instrument
TSQ Vantage
Internal Standard
peptide
Peptide Standard Purity
>95%
Peptide Standard Label Type
13C and 15N at C-terminus K
LC
Waters nanoACQUITY (Part Number 176016000)
Column Packing
Waters BEH C18, 1.7 um 130 Å (Part Number 186007485)
Column Dimensions
100 um x 100 mm
Flow Rate
0.5 uL/min

Assay Multiplexing Expand assay panel

Pacific Northwest National Laboratory-DirectSRM3

CPTAC-1593:
ABI2.
ALFDSYTNLER 		CPTAC-1594:
ALDH2.
VAEQTPLTALYVANLIK 		CPTAC-1595:
ANP32B.
ELVLDNC[+57.0]K
CPTAC-1596:
AP1B1.
LLSTDPVAAK 		CPTAC-1597:
ARPC2.
VFMQEFK 		CPTAC-1598:
BRD2.
LMFSNC[+57.0]YK
CPTAC-1599:
CDH1.
GLDARPEVTR 		CPTAC-1600:
CBX3.
DSDEADLVLAK 		CPTAC-1601:
CDC42.
NVFDEAILAALEPPEPK
CPTAC-1602:
CDK9.
IGQGTFGEVFK 		CPTAC-1603:
C20orf27.
LLSVVPVPEGYSVK 		CPTAC-1604:
DOCK2.
DILLPVITK
CPTAC-1605:
EHD2.
LEGHGLPANLPR 		CPTAC-1606:
EML1.
VQMQEDDIQLLK 		CPTAC-1607:
ENY2.
ALVPDSVK
CPTAC-1608:
FIGNL1.
GILLFGPPGTGK 		CPTAC-1609:
GRB2.
ATADDELSFK 		CPTAC-1610:
GTPBP1.
VGDNDFLEVR
CPTAC-1611:
C15orf38-AP3S2.
TGASWTDNIMAQK 		CPTAC-1612:
HM13.
SFEAPIK 		CPTAC-1613:
EPHX1.
DVELLYPVK
CPTAC-1614:
ITGA1.
FGTAIAAVK 		CPTAC-1615:
PRKCA.
GTEELYAIK 		CPTAC-1616:
LNPK.
IVEYLVGDGPQNR
CPTAC-1617:
LRP1.
AALSGANVLTLIEK 		CPTAC-1618:
MCM2.
GLALALFGGEPK 		CPTAC-1619:
MTA1.
YQADITDLLK
CPTAC-1620:
MYO1G.
TLVTLEQSR 		CPTAC-1621:
NEK7.
VQIFDLMDAK 		CPTAC-1622:
NF1.
LVFIDC[+57.0]PGK
CPTAC-1623:
FAM129A.
VLTSEDEYNLLSDR 		CPTAC-1624:
NMRAL1.
LGFPGAR 		CPTAC-1625:
OSBPL10.
LLEHGEEYVFTLPSAYAR
CPTAC-1626:
PIK3R1.
TATGYGFAEPYNLYSSLK 		CPTAC-1627:
PACSIN2.
AIYHDLEQSIR 		CPTAC-1628:
PAK2.
SVIDPVPAPVGDSHVDGAAK
CPTAC-1629:
PELP1.
TGSAVAPVHPPNR 		CPTAC-1630:
PDGFRB.
LLGEVGTLQFAELHR 		CPTAC-1631:
PIK3CA.
LINLTDILK
CPTAC-1632:
ARL6IP5.
AWDDFFPGSDR 		CPTAC-1633:
RNF121.
GWC[+57.0]IVGK 		CPTAC-1634:
POLR1E.
HFVGILNK
CPTAC-1635:
PDCD11.
VTPNEGLTVSFPFGK 		CPTAC-1636:
SMARCA5.
TEQEEDEELLTESSK 		CPTAC-1637:
SSBP1.
SGDSEVYQLGDVSQK
CPTAC-1638:
STAT5B.
ATQLLEGLVQELQK 		CPTAC-1639:
STAT6.
SVSWSQFNK 		CPTAC-1640:
STRN.
SELTDSASVLDNFK
CPTAC-1641:
SVIL.
YGSFEEAEASYPILNR 		CPTAC-1642:
VARS.
NVIHPFLSR 		CPTAC-1643:
CCT6A.
GIDPFSLDALSK
CPTAC-1644:
TGM2.
SEGTYC[+57.0]C[+57.0]GPVPVR 		CPTAC-1645:
TIA1.
AAFAPFGR 		CPTAC-1646:
TMEM43.
LEDPHVDIIR
CPTAC-1647:
TRA2A.
YGPLSGVNVVYDQR

Chromatograms

Data source: Panorama

view larger image
view larger image
view larger image

Response Curves

Data source: Panorama

view larger image
view larger image
view larger image

Retrieving Data

Loader

Repeatability

Data source: Panorama

view larger image
  Average intra-assay CV
(within day CV)		 Average inter-assay CV
(between day CV)		 Total CV
equation		 n=
Fragment ion / Transition Low Med High Low Med High Low Med High Low Med High
y11 (1+) 11.9 6 5.6 12.1 6.6 8.8 17 8.9 10.4 15 15 15
y10 (1+) 8.8 5.6 2.9 9.2 5.5 7 12.7 7.8 7.6 15 15 15
y9 (1+) 9.9 5.4 8.1 10.2 5.9 8.2 14.2 8 11.5 15 15 15
y8 (1+) 9.3 8.1 6.3 18.5 17 13.2 20.7 18.8 14.6 15 15 15
sum 6.1 4.2 3 7.4 5 6.9 9.6 6.5 7.5 15 15 15

Additional Resources and Comments

Resources
Download SOPs
View Peptide in Panorama
View Protein in Panorama
Comments

Assay Details for CPTAC-1740 Collapse assay details

Data source: Panorama

Official Gene Symbol
PIK3R1
Peptide Modified Sequence
LY[+80.0]EEYTR
Modification Type
Phospho (Y)
Protein - Site of Modification
467
Peptide - Site of Modification
2
Peptide Start
466
Peptide End
472
CPTAC ID
CPTAC-1740
Peptide Molecular Mass
1,052.4216
Species
Homo sapiens (Human)
Assay Type
Enrichment MRM or SRM
Enrichment Method
N/A
Matrix
Ovarian cancer cell lysate
Submitting Laboratory
Pacific Northwest National Laboratory
Submitting Lab PI
Tao Liu

Assay Parameters Collapse assay parameters

Data source: Panorama

Instrument
TSQ Vantage
Internal Standard
peptide
Peptide Standard Purity
>95%
Peptide Standard Label Type
13C and 15N at C-terminus R
LC
Waters nanoACQUITY (Part Number 176016000)
Column Packing
Waters BEH C18, 1.7 um 130 Å (Part Number 186007485)
Column Dimensions
100 um x 100 mm
Flow Rate
0.5 uL/min

Assay Multiplexing Expand assay panel

Pacific Northwest National Laboratory-DirectSRM3

CPTAC-1593:
ABI2.
ALFDSYTNLER 		CPTAC-1594:
ALDH2.
VAEQTPLTALYVANLIK 		CPTAC-1595:
ANP32B.
ELVLDNC[+57.0]K
CPTAC-1596:
AP1B1.
LLSTDPVAAK 		CPTAC-1597:
ARPC2.
VFMQEFK 		CPTAC-1598:
BRD2.
LMFSNC[+57.0]YK
CPTAC-1599:
CDH1.
GLDARPEVTR 		CPTAC-1600:
CBX3.
DSDEADLVLAK 		CPTAC-1601:
CDC42.
NVFDEAILAALEPPEPK
CPTAC-1602:
CDK9.
IGQGTFGEVFK 		CPTAC-1603:
C20orf27.
LLSVVPVPEGYSVK 		CPTAC-1604:
DOCK2.
DILLPVITK
CPTAC-1605:
EHD2.
LEGHGLPANLPR 		CPTAC-1606:
EML1.
VQMQEDDIQLLK 		CPTAC-1607:
ENY2.
ALVPDSVK
CPTAC-1608:
FIGNL1.
GILLFGPPGTGK 		CPTAC-1609:
GRB2.
ATADDELSFK 		CPTAC-1610:
GTPBP1.
VGDNDFLEVR
CPTAC-1611:
C15orf38-AP3S2.
TGASWTDNIMAQK 		CPTAC-1612:
HM13.
SFEAPIK 		CPTAC-1613:
EPHX1.
DVELLYPVK
CPTAC-1614:
ITGA1.
FGTAIAAVK 		CPTAC-1615:
PRKCA.
GTEELYAIK 		CPTAC-1616:
LNPK.
IVEYLVGDGPQNR
CPTAC-1617:
LRP1.
AALSGANVLTLIEK 		CPTAC-1618:
MCM2.
GLALALFGGEPK 		CPTAC-1619:
MTA1.
YQADITDLLK
CPTAC-1620:
MYO1G.
TLVTLEQSR 		CPTAC-1621:
NEK7.
VQIFDLMDAK 		CPTAC-1622:
NF1.
LVFIDC[+57.0]PGK
CPTAC-1623:
FAM129A.
VLTSEDEYNLLSDR 		CPTAC-1624:
NMRAL1.
LGFPGAR 		CPTAC-1625:
OSBPL10.
LLEHGEEYVFTLPSAYAR
CPTAC-1626:
PIK3R1.
TATGYGFAEPYNLYSSLK 		CPTAC-1627:
PACSIN2.
AIYHDLEQSIR 		CPTAC-1628:
PAK2.
SVIDPVPAPVGDSHVDGAAK
CPTAC-1629:
PELP1.
TGSAVAPVHPPNR 		CPTAC-1630:
PDGFRB.
LLGEVGTLQFAELHR 		CPTAC-1631:
PIK3CA.
LINLTDILK
CPTAC-1632:
ARL6IP5.
AWDDFFPGSDR 		CPTAC-1633:
RNF121.
GWC[+57.0]IVGK 		CPTAC-1634:
POLR1E.
HFVGILNK
CPTAC-1635:
PDCD11.
VTPNEGLTVSFPFGK 		CPTAC-1636:
SMARCA5.
TEQEEDEELLTESSK 		CPTAC-1637:
SSBP1.
SGDSEVYQLGDVSQK
CPTAC-1638:
STAT5B.
ATQLLEGLVQELQK 		CPTAC-1639:
STAT6.
SVSWSQFNK 		CPTAC-1640:
STRN.
SELTDSASVLDNFK
CPTAC-1641:
SVIL.
YGSFEEAEASYPILNR 		CPTAC-1642:
VARS.
NVIHPFLSR 		CPTAC-1643:
CCT6A.
GIDPFSLDALSK
CPTAC-1644:
TGM2.
SEGTYC[+57.0]C[+57.0]GPVPVR 		CPTAC-1645:
TIA1.
AAFAPFGR 		CPTAC-1646:
TMEM43.
LEDPHVDIIR
CPTAC-1647:
TRA2A.
YGPLSGVNVVYDQR

Chromatograms

Data source: Panorama

view larger image
view larger image
view larger image

Response Curves

Data source: Panorama

view larger image
view larger image
view larger image

Retrieving Data

Loader

Repeatability

Data source: Panorama

view larger image
  Average intra-assay CV
(within day CV)		 Average inter-assay CV
(between day CV)		 Total CV
equation		 n=
Fragment ion / Transition Low Med High Low Med High Low Med High Low Med High
y4 (1+) 22.9 4.8 5.1 27 6.2 6 35.4 7.8 7.9 15 15 15
y5 (1+) 7.7 2.2 3.5 8.6 3.2 4.1 11.5 3.9 5.4 15 15 15
y6 (1+) 6.4 2.7 3.9 11.2 4.7 5 12.9 5.4 6.3 15 15 15
sum 6.9 1.5 3.1 9.5 3.2 3.8 11.7 3.5 4.9 15 15 15

Additional Resources and Comments

Resources
Download SOPs
View Peptide in Panorama
View Protein in Panorama
Comments

Assay Details for CPTAC-1626 Collapse assay details

Data source: Panorama

Official Gene Symbol
PIK3R1
Peptide Sequence
TATGYGFAEPYNLYSSLK
Modification Type
unmodified
Protein - Site of Modification
N/A
Peptide - Site of Modification
N/A
Peptide Start
675
Peptide End
692
CPTAC ID
CPTAC-1626
Peptide Molecular Mass
1,980.9469
Species
Homo sapiens (Human)
Assay Type
Direct MRM or SRM
Matrix
Ovarian cancer tumor tissue lysate
Submitting Laboratory
Pacific Northwest National Laboratory
Submitting Lab PI
Tao Liu

Assay Parameters Collapse assay parameters

Data source: Panorama

Instrument
TSQ Vantage
Internal Standard
peptide
Peptide Standard Purity
>95%
Peptide Standard Label Type
13C and 15N at C-terminus K
LC
Waters nanoACQUITY (Part Number 176016000)
Column Packing
Waters BEH C18, 1.7 um 130 Å (Part Number 186007485)
Column Dimensions
100 um x 100 mm
Flow Rate
0.5 uL/min

Assay Multiplexing Expand assay panel

Pacific Northwest National Laboratory-DirectSRM3

CPTAC-1593:
ABI2.
ALFDSYTNLER 		CPTAC-1594:
ALDH2.
VAEQTPLTALYVANLIK 		CPTAC-1595:
ANP32B.
ELVLDNC[+57.0]K
CPTAC-1596:
AP1B1.
LLSTDPVAAK 		CPTAC-1597:
ARPC2.
VFMQEFK 		CPTAC-1598:
BRD2.
LMFSNC[+57.0]YK
CPTAC-1599:
CDH1.
GLDARPEVTR 		CPTAC-1600:
CBX3.
DSDEADLVLAK 		CPTAC-1601:
CDC42.
NVFDEAILAALEPPEPK
CPTAC-1602:
CDK9.
IGQGTFGEVFK 		CPTAC-1603:
C20orf27.
LLSVVPVPEGYSVK 		CPTAC-1604:
DOCK2.
DILLPVITK
CPTAC-1605:
EHD2.
LEGHGLPANLPR 		CPTAC-1606:
EML1.
VQMQEDDIQLLK 		CPTAC-1607:
ENY2.
ALVPDSVK
CPTAC-1608:
FIGNL1.
GILLFGPPGTGK 		CPTAC-1609:
GRB2.
ATADDELSFK 		CPTAC-1610:
GTPBP1.
VGDNDFLEVR
CPTAC-1611:
C15orf38-AP3S2.
TGASWTDNIMAQK 		CPTAC-1612:
HM13.
SFEAPIK 		CPTAC-1613:
EPHX1.
DVELLYPVK
CPTAC-1614:
ITGA1.
FGTAIAAVK 		CPTAC-1615:
PRKCA.
GTEELYAIK 		CPTAC-1616:
LNPK.
IVEYLVGDGPQNR
CPTAC-1617:
LRP1.
AALSGANVLTLIEK 		CPTAC-1618:
MCM2.
GLALALFGGEPK 		CPTAC-1619:
MTA1.
YQADITDLLK
CPTAC-1620:
MYO1G.
TLVTLEQSR 		CPTAC-1621:
NEK7.
VQIFDLMDAK 		CPTAC-1622:
NF1.
LVFIDC[+57.0]PGK
CPTAC-1623:
FAM129A.
VLTSEDEYNLLSDR 		CPTAC-1624:
NMRAL1.
LGFPGAR 		CPTAC-1625:
OSBPL10.
LLEHGEEYVFTLPSAYAR
CPTAC-1626:
PIK3R1.
TATGYGFAEPYNLYSSLK 		CPTAC-1627:
PACSIN2.
AIYHDLEQSIR 		CPTAC-1628:
PAK2.
SVIDPVPAPVGDSHVDGAAK
CPTAC-1629:
PELP1.
TGSAVAPVHPPNR 		CPTAC-1630:
PDGFRB.
LLGEVGTLQFAELHR 		CPTAC-1631:
PIK3CA.
LINLTDILK
CPTAC-1632:
ARL6IP5.
AWDDFFPGSDR 		CPTAC-1633:
RNF121.
GWC[+57.0]IVGK 		CPTAC-1634:
POLR1E.
HFVGILNK
CPTAC-1635:
PDCD11.
VTPNEGLTVSFPFGK 		CPTAC-1636:
SMARCA5.
TEQEEDEELLTESSK 		CPTAC-1637:
SSBP1.
SGDSEVYQLGDVSQK
CPTAC-1638:
STAT5B.
ATQLLEGLVQELQK 		CPTAC-1639:
STAT6.
SVSWSQFNK 		CPTAC-1640:
STRN.
SELTDSASVLDNFK
CPTAC-1641:
SVIL.
YGSFEEAEASYPILNR 		CPTAC-1642:
VARS.
NVIHPFLSR 		CPTAC-1643:
CCT6A.
GIDPFSLDALSK
CPTAC-1644:
TGM2.
SEGTYC[+57.0]C[+57.0]GPVPVR 		CPTAC-1645:
TIA1.
AAFAPFGR 		CPTAC-1646:
TMEM43.
LEDPHVDIIR
CPTAC-1647:
TRA2A.
YGPLSGVNVVYDQR

Chromatograms

Data source: Panorama

view larger image
view larger image
view larger image

Response Curves

Data source: Panorama

view larger image
view larger image
view larger image

Retrieving Data

Loader

Repeatability

Data source: Panorama

view larger image
  Average intra-assay CV
(within day CV)		 Average inter-assay CV
(between day CV)		 Total CV
equation		 n=
Fragment ion / Transition Low Med High Low Med High Low Med High Low Med High
y9 (1+) 5.6 4.3 4.5 13.8 7.2 12.3 14.9 8.4 13.1 15 15 15
y11 (1+) 8.6 8 6.2 17 20.3 11.4 19.1 21.8 13 15 15 15
y13 (1+) 23.8 24.7 26.9 24.5 31 37.4 34.2 39.6 46.1 15 15 15
sum 5.1 6.4 7.5 13.1 13.1 12.5 14.1 14.6 14.6 15 15 15

Additional Resources and Comments

Resources
Download SOPs
View Peptide in Panorama
View Protein in Panorama
Comments