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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.

C4A

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Available Assays

Overview Data source: UniProt

Official Gene Symbol Other Aliases
C4A CO4, CPAMD2
Sequence Length (AA) Molecular Weight (Da)
1744 192785
Protein Name
Complement C4-A
Sources
UniProt
PhosphoSitePlus ®
GeneCards 		Human Protein Atlas

Protein Sequence hover to view complete sequence

10 20 30 40 50
MRLLWGLIWA SSFFTLSLQK PRLLLFSPSV VHLGVPLSVG VQLQDVPRGQ
60 70 80 90 100
VVKGSVFLRN PSRNNVPCSP KVDFTLSSER DFALLSLQVP LKDAKSCGLH
110 120 130 140 150
QLLRGPEVQL VAHSPWLKDS LSRTTNIQGI NLLFSSRRGH LFLQTDQPIY
160 170 180 190 200
NPGQRVRYRV FALDQKMRPS TDTITVMVEN SHGLRVRKKE VYMPSSIFQD
210 220 230 240 250
DFVIPDISEP GTWKISARFS DGLESNSSTQ FEVKKYVLPN FEVKITPGKP
260 270 280 290 300
YILTVPGHLD EMQLDIQARY IYGKPVQGVA YVRFGLLDED GKKTFFRGLE
310 320 330 340 350
SQTKLVNGQS HISLSKAEFQ DALEKLNMGI TDLQGLRLYV AAAIIESPGG
360 370 380 390 400
EMEEAELTSW YFVSSPFSLD LSKTKRHLVP GAPFLLQALV REMSGSPASG
410 420 430 440 450
IPVKVSATVS SPGSVPEVQD IQQNTDGSGQ VSIPIIIPQT ISELQLSVSA
460 470 480 490 500
GSPHPAIARL TVAAPPSGGP GFLSIERPDS RPPRVGDTLN LNLRAVGSGA
510 520 530 540 550
TFSHYYYMIL SRGQIVFMNR EPKRTLTSVS VFVDHHLAPS FYFVAFYYHG
560 570 580 590 600
DHPVANSLRV DVQAGACEGK LELSVDGAKQ YRNGESVKLH LETDSLALVA
610 620 630 640 650
LGALDTALYA AGSKSHKPLN MGKVFEAMNS YDLGCGPGGG DSALQVFQAA
660 670 680 690 700
GLAFSDGDQW TLSRKRLSCP KEKTTRKKRN VNFQKAINEK LGQYASPTAK
710 720 730 740 750
RCCQDGVTRL PMMRSCEQRA ARVQQPDCRE PFLSCCQFAE SLRKKSRDKG
760 770 780 790 800
QAGLQRALEI LQEEDLIDED DIPVRSFFPE NWLWRVETVD RFQILTLWLP
810 820 830 840 850
DSLTTWEIHG LSLSKTKGLC VATPVQLRVF REFHLHLRLP MSVRRFEQLE
860 870 880 890 900
LRPVLYNYLD KNLTVSVHVS PVEGLCLAGG GGLAQQVLVP AGSARPVAFS
910 920 930 940 950
VVPTAAAAVS LKVVARGSFE FPVGDAVSKV LQIEKEGAIH REELVYELNP
960 970 980 990 1000
LDHRGRTLEI PGNSDPNMIP DGDFNSYVRV TASDPLDTLG SEGALSPGGV
1010 1020 1030 1040 1050
ASLLRLPRGC GEQTMIYLAP TLAASRYLDK TEQWSTLPPE TKDHAVDLIQ
1060 1070 1080 1090 1100
KGYMRIQQFR KADGSYAAWL SRDSSTWLTA FVLKVLSLAQ EQVGGSPEKL
1110 1120 1130 1140 1150
QETSNWLLSQ QQADGSFQDP CPVLDRSMQG GLVGNDETVA LTAFVTIALH
1160 1170 1180 1190 1200
HGLAVFQDEG AEPLKQRVEA SISKANSFLG EKASAGLLGA HAAAITAYAL
1210 1220 1230 1240 1250
TLTKAPVDLL GVAHNNLMAM AQETGDNLYW GSVTGSQSNA VSPTPAPRNP
1260 1270 1280 1290 1300
SDPMPQAPAL WIETTAYALL HLLLHEGKAE MADQASAWLT RQGSFQGGFR
1310 1320 1330 1340 1350
STQDTVIALD ALSAYWIASH TTEERGLNVT LSSTGRNGFK SHALQLNNRQ
1360 1370 1380 1390 1400
IRGLEEELQF SLGSKINVKV GGNSKGTLKV LRTYNVLDMK NTTCQDLQIE
1410 1420 1430 1440 1450
VTVKGHVEYT MEANEDYEDY EYDELPAKDD PDAPLQPVTP LQLFEGRRNR
1460 1470 1480 1490 1500
RRREAPKVVE EQESRVHYTV CIWRNGKVGL SGMAIADVTL LSGFHALRAD
1510 1520 1530 1540 1550
LEKLTSLSDR YVSHFETEGP HVLLYFDSVP TSRECVGFEA VQEVPVGLVQ
1560 1570 1580 1590 1600
PASATLYDYY NPERRCSVFY GAPSKSRLLA TLCSAEVCQC AEGKCPRQRR
1610 1620 1630 1640 1650
ALERGLQDED GYRMKFACYY PRVEYGFQVK VLREDSRAAF RLFETKITQV
1660 1670 1680 1690 1700
LHFTKDVKAA ANQMRNFLVR ASCRLRLEPG KEYLIMGLDG ATYDLEGHPQ
1710 1720 1730 1740 1744
YLLDSNSWIE EMPSERLCRS TRQRAACAQL NDFLQEYGTQ GCQV

Data source: UniProt

Protein Map Collapse protein map

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

Uniprot Database Entry PhosphoSitePlus ®

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Phosphorylation Acetylation Ubiquitylation Other

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Assay Details for CPTAC-665 Collapse assay details

Data source: Panorama

Official Gene Symbol
C4A
Peptide Modified Sequence
FSDGLESN[+1.0]SSTQFEVK
Modification Type
Deamidated (NQ)
Protein - Site of Modification
226
Peptide - Site of Modification
8
Peptide Start
219
Peptide End
234
CPTAC ID
CPTAC-665
Peptide Molecular Mass
1,774.7898
Species
Homo sapiens (Human)
Assay Type
Enrichment PRM
Enrichment Method
N-linked glycopeptide solid phase extraction
Matrix
serum
Submitting Laboratory
Johns Hopkins University
Submitting Lab PI
Daniel Chan, Hui Zhang, Zhen Zhang

Assay Parameters Collapse assay parameters

Data source: Panorama

Instrument
Q-Exactive (ThermoFisher)
Internal Standard
synthetic peptide
Peptide Standard Purity
Crude
Peptide Standard Label Type
13C and 15N at C-terminus K
LC
Dionex UltiMate 3000 RSLCnano LC (ThermoFisher)
Column Packing
Acclaim PepMap100 C18, 5um (Trap); Acclaim PepMap RSLC C18, 2um (Analytical)
Column Dimensions
300um x 5mm (Trap); 75um x 25cm (Analytical)
Flow Rate
0.5 uL/min

Assay Multiplexing Expand assay panel

Johns Hopkins University-A

CPTAC-648:
APMAP.
AGPN[+1.0]GTLFVADAYK 		CPTAC-649:
AFM.
DIENFN[+1.0]STQK 		CPTAC-650:
AFM.
FN[+1.0]ETTEK
CPTAC-651:
SERPINA1.
YLGN[+1.0]ATAIFFLPDEGK 		CPTAC-652:
APOB.
FN[+1.0]SSYLQGTNQITGR 		CPTAC-653:
APOB.
YDFN[+1.0]SSM[+16.0]LYSTAK
CPTAC-654:
APOH.
VYKPSAGN[+1.0]NSLYR 		CPTAC-655:
BTD.
FN[+1.0]DTEVLQR 		CPTAC-656:
CDH13.
IN[+1.0]NTHALVSLLQNLNK
CPTAC-657:
CPB2.
QVHFFVN[+1.0]ASDVDNVK 		CPTAC-658:
CTSD.
GSLSYLN[+1.0]VTR 		CPTAC-659:
JCHAIN.
EN[+1.0]ISDPTSPLR
CPTAC-660:
CP.
EHEGAIYPDN[+1.0]TTDFQR 		CPTAC-661:
CLU.
EDALN[+1.0]ETR 		CPTAC-662:
CLU.
LAN[+1.0]LTQGEDQYYLR
CPTAC-663:
DKFZp779M0311.
QSVPAHFVALN[+1.0]GSK 		CPTAC-664:
ATRN.
IDSTGN[+1.0]VTNELR 		CPTAC-665:
C4A.
FSDGLESN[+1.0]SSTQFEVK
CPTAC-666:
C4A.
GLN[+1.0]VTLSSTGR 		CPTAC-667:
C8A.
GGSSGWSGGLAQN[+1.0]R 		CPTAC-668:
CD44.
AFN[+1.0]STLPTM[+16.0]AQM[+16.0]EK
CPTAC-669:
IGHG1.
EEQYN[+1.0]STYR 		CPTAC-670:
LGALS3BP.
ALGFEN[+1.0]ATQALGR 		CPTAC-671:
HP.
VVLHPN[+1.0]YSQVDIGLIK
CPTAC-672:
SERPINA4.
FLN[+1.0]DTM[+16.0]AVYEAK 		CPTAC-673:
IGHG4.
EEQFN[+1.0]STYR 		CPTAC-674:
IGHA2.
TPLTAN[+1.0]ITK
CPTAC-675:
IGHG2.
EEQFN[+1.0]STFR 		CPTAC-676:
ITIH2.
GAFISN[+1.0]FSM[+16.0]TVDGK 		CPTAC-677:
ICAM2.
AAPAPQEATATFN[+1.0]STADR
CPTAC-678:
LRG1.
LPPGLLAN[+1.0]FTLLR 		CPTAC-679:
LYVE1.
ANQQLN[+1.0]FTEAK 		CPTAC-680:
TIMP1.
FVGTPEVN[+1.0]QTTLYQR
CPTAC-681:
LCN2.
SYN[+1.0]VTSVLFR 		CPTAC-682:
KLKB1.
IYPGVDFGGEELN[+1.0]VTFVK 		CPTAC-683:
KLKB1.
IYSGILN[+1.0]LSDITK
CPTAC-684:
SERPING1.
DTFVN[+1.0]ASR 		CPTAC-685:
PIGR.
VPGN[+1.0]VTAVLGETLK 		CPTAC-686:
PTGDS.
SVVAPATDGGLN[+1.0]LTSTFLR
CPTAC-687:
KNG1.
LNAENN[+1.0]ATFYFK 		CPTAC-688:
LAMP2.
LN[+1.0]SSTIK 		CPTAC-689:
LAMP2.
VQPFN[+1.0]VTQGK
CPTAC-690:
VTN.
N[+1.0]GSLFAFR

Chromatograms

Data source: Panorama

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Response Curves

Data source: Panorama

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Retrieving Data

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Repeatability

Data source: Panorama

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  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+) 8 5.4 4.6 7.6 5.3 4.7 11 7.6 6.6 15 15 15
y10 (1+) 7.4 5 4.8 7.7 4.9 5 10.7 7 6.9 15 15 15
y9 (1+) 7.3 6.2 5.9 8.8 6.1 6.7 11.4 8.7 8.9 15 15 15
sum 6.2 5 4 7 4.8 4.4 9.4 6.9 5.9 15 15 15

Additional Resources and Comments

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

Assay Details for CPTAC-666 Collapse assay details

Data source: Panorama

Official Gene Symbol
C4A
Peptide Modified Sequence
GLN[+1.0]VTLSSTGR
Modification Type
Deamidated (NQ)
Protein - Site of Modification
1328
Peptide - Site of Modification
3
Peptide Start
1326
Peptide End
1336
CPTAC ID
CPTAC-666
Peptide Molecular Mass
1,104.5775
Species
Homo sapiens (Human)
Assay Type
Enrichment PRM
Enrichment Method
N-linked glycopeptide solid phase extraction
Matrix
serum
Submitting Laboratory
Johns Hopkins University
Submitting Lab PI
Daniel Chan, Hui Zhang, Zhen Zhang

Assay Parameters Collapse assay parameters

Data source: Panorama

Instrument
Q-Exactive (ThermoFisher)
Internal Standard
synthetic peptide
Peptide Standard Purity
Crude
Peptide Standard Label Type
13C and 15N at C-terminus K
LC
Dionex UltiMate 3000 RSLCnano LC (ThermoFisher)
Column Packing
Acclaim PepMap100 C18, 5um (Trap); Acclaim PepMap RSLC C18, 2um (Analytical)
Column Dimensions
300um x 5mm (Trap); 75um x 25cm (Analytical)
Flow Rate
0.5 uL/min

Assay Multiplexing Expand assay panel

Johns Hopkins University-A

CPTAC-648:
APMAP.
AGPN[+1.0]GTLFVADAYK 		CPTAC-649:
AFM.
DIENFN[+1.0]STQK 		CPTAC-650:
AFM.
FN[+1.0]ETTEK
CPTAC-651:
SERPINA1.
YLGN[+1.0]ATAIFFLPDEGK 		CPTAC-652:
APOB.
FN[+1.0]SSYLQGTNQITGR 		CPTAC-653:
APOB.
YDFN[+1.0]SSM[+16.0]LYSTAK
CPTAC-654:
APOH.
VYKPSAGN[+1.0]NSLYR 		CPTAC-655:
BTD.
FN[+1.0]DTEVLQR 		CPTAC-656:
CDH13.
IN[+1.0]NTHALVSLLQNLNK
CPTAC-657:
CPB2.
QVHFFVN[+1.0]ASDVDNVK 		CPTAC-658:
CTSD.
GSLSYLN[+1.0]VTR 		CPTAC-659:
JCHAIN.
EN[+1.0]ISDPTSPLR
CPTAC-660:
CP.
EHEGAIYPDN[+1.0]TTDFQR 		CPTAC-661:
CLU.
EDALN[+1.0]ETR 		CPTAC-662:
CLU.
LAN[+1.0]LTQGEDQYYLR
CPTAC-663:
DKFZp779M0311.
QSVPAHFVALN[+1.0]GSK 		CPTAC-664:
ATRN.
IDSTGN[+1.0]VTNELR 		CPTAC-665:
C4A.
FSDGLESN[+1.0]SSTQFEVK
CPTAC-666:
C4A.
GLN[+1.0]VTLSSTGR 		CPTAC-667:
C8A.
GGSSGWSGGLAQN[+1.0]R 		CPTAC-668:
CD44.
AFN[+1.0]STLPTM[+16.0]AQM[+16.0]EK
CPTAC-669:
IGHG1.
EEQYN[+1.0]STYR 		CPTAC-670:
LGALS3BP.
ALGFEN[+1.0]ATQALGR 		CPTAC-671:
HP.
VVLHPN[+1.0]YSQVDIGLIK
CPTAC-672:
SERPINA4.
FLN[+1.0]DTM[+16.0]AVYEAK 		CPTAC-673:
IGHG4.
EEQFN[+1.0]STYR 		CPTAC-674:
IGHA2.
TPLTAN[+1.0]ITK
CPTAC-675:
IGHG2.
EEQFN[+1.0]STFR 		CPTAC-676:
ITIH2.
GAFISN[+1.0]FSM[+16.0]TVDGK 		CPTAC-677:
ICAM2.
AAPAPQEATATFN[+1.0]STADR
CPTAC-678:
LRG1.
LPPGLLAN[+1.0]FTLLR 		CPTAC-679:
LYVE1.
ANQQLN[+1.0]FTEAK 		CPTAC-680:
TIMP1.
FVGTPEVN[+1.0]QTTLYQR
CPTAC-681:
LCN2.
SYN[+1.0]VTSVLFR 		CPTAC-682:
KLKB1.
IYPGVDFGGEELN[+1.0]VTFVK 		CPTAC-683:
KLKB1.
IYSGILN[+1.0]LSDITK
CPTAC-684:
SERPING1.
DTFVN[+1.0]ASR 		CPTAC-685:
PIGR.
VPGN[+1.0]VTAVLGETLK 		CPTAC-686:
PTGDS.
SVVAPATDGGLN[+1.0]LTSTFLR
CPTAC-687:
KNG1.
LNAENN[+1.0]ATFYFK 		CPTAC-688:
LAMP2.
LN[+1.0]SSTIK 		CPTAC-689:
LAMP2.
VQPFN[+1.0]VTQGK
CPTAC-690:
VTN.
N[+1.0]GSLFAFR

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+) 12.5 5.6 5.7 14.4 7 5.5 19.1 9 7.9 15 15 15
y7 (1+) 8.7 4.8 5.7 9.1 5.8 5.6 12.6 7.5 8 15 15 15
y6 (1+) 9.3 5.5 7.9 10.3 5.2 8.9 13.9 7.6 11.9 15 15 15
sum 7.7 4.3 6.1 8 5.3 6 11.1 6.8 8.6 15 15 15

Additional Resources and Comments

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