Product: Phospho-VEGFR1 (Tyr1213) Antibody
Catalog: AF3204
Description: Rabbit polyclonal antibody to Phospho-VEGFR1 (Tyr1213)
Application: WB IHC IF/ICC
Reactivity: Human, Mouse, Rat
Prediction: Pig, Bovine, Horse, Rabbit, Dog
Mol.Wt.: 151 kDa; 151kD(Calculated).
Uniprot: P17948
RRID: AB_2834636

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 100ul $280 In stock
 200ul $350 In stock

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Product Info

WB 1:500-1:2000, IF/ICC 1:100-1:500, IHC 1:50-1:200
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Pig(91%), Bovine(91%), Horse(91%), Rabbit(91%), Dog(91%)
Phospho-VEGFR1 (Tyr1213) Antibody detects endogenous levels of VEGFR1 only when phosphorylated at Tyrosine 1213.
Cite Format: Affinity Biosciences Cat# AF3204, RRID:AB_2834636.
The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


EC; FLT 1; FLT; Flt-1; FLT1; Fms like tyrosine kinase 1; Fms related tyrosine kinase 1; Fms related tyrosine kinase 1 (vascular endothelial growth factor/vascular permeability factor receptor); Fms related tyrosine kinase 1 vascular endothelial growth factor/vascular permeability factor receptor; Fms-like tyrosine kinase 1; FRT; Soluble VEGF receptor 1 14; Soluble VEGFR1 variant 2; Soluble VEGFR1 variant 21; Tyrosine protein kinase FRT; Tyrosine protein kinase receptor FLT; Tyrosine-protein kinase FRT; Tyrosine-protein kinase receptor FLT; Vascular endothelial growth factor receptor 1; Vascular endothelial growth factor vascular permeability factor receptor; Vascular permeability factor receptor 1; Vascular permeability factor receptor; VEGFR 1; VEGFR-1; VEGFR1; VGFR1_HUMAN;



Detected in normal lung, but also in placenta, liver, kidney, heart and brain tissues. Specifically expressed in most of the vascular endothelial cells, and also expressed in peripheral blood monocytes. Isoform 2 is strongly expressed in placenta. Isoform 3 is expressed in corneal epithelial cells (at protein level). Isoform 3 is expressed in vascular smooth muscle cells (VSMC).

Oncogene FLT belongs to the src gene family and is related to oncogene ROS (MIM 165020). Like other members of this family, it shows tyrosine protein kinase activity that is important for the control of cell proliferation and differentiation. The sequence structure of the FLT gene resembles that of the FMS gene (MIM 164770); hence, Yoshida et al. (1987) proposed the name FLT as an acronym for FMS-like tyrosine kinase.



Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

PTMs - P17948 As Substrate

Site PTM Type Enzyme
T218 Phosphorylation
T222 Phosphorylation
T255 Phosphorylation
T265 Phosphorylation
S267 Phosphorylation
K306 Methylation
Y383 Phosphorylation
Y388 Phosphorylation
T404 Phosphorylation
K410 Ubiquitination
T588 Phosphorylation
T599 Phosphorylation
T618 Phosphorylation
S631 Phosphorylation
T633 Phosphorylation
S739 Phosphorylation
S742 Phosphorylation
S743 Phosphorylation
Y745 Phosphorylation
T747 Phosphorylation
T751 Phosphorylation
Y794 Phosphorylation P17948 (FLT1)
Y815 Phosphorylation
K831 Methylation
Y911 Phosphorylation
Y914 Phosphorylation P17948 (FLT1)
Y920 Phosphorylation
K932 Methylation
Y1048 Phosphorylation
Y1053 Phosphorylation
K1064 Ubiquitination
K1153 Methylation
Y1169 Phosphorylation P17948 (FLT1)
S1197 Phosphorylation
S1199 Phosphorylation
K1202 Ubiquitination
S1205 Phosphorylation
S1207 Phosphorylation
Y1213 Phosphorylation P17948 (FLT1)
Y1242 Phosphorylation P17948 (FLT1)
Y1309 Phosphorylation P17948 (FLT1)
Y1327 Phosphorylation P17948 (FLT1)
Y1333 Phosphorylation P17948 (FLT1)

PTMs - P17948 As Enzyme

Substrate Site Source
P17948 (FLT1) Y794 Uniprot
P17948 (FLT1) Y914 Uniprot
P17948 (FLT1) Y1169 Uniprot
P17948 (FLT1) Y1213 Uniprot
P17948 (FLT1) Y1242 Uniprot
P17948 (FLT1) Y1309 Uniprot
P17948 (FLT1) Y1327 Uniprot
P17948 (FLT1) Y1333 Uniprot

Research Backgrounds


Tyrosine-protein kinase that acts as a cell-surface receptor for VEGFA, VEGFB and PGF, and plays an essential role in the development of embryonic vasculature, the regulation of angiogenesis, cell survival, cell migration, macrophage function, chemotaxis, and cancer cell invasion. May play an essential role as a negative regulator of embryonic angiogenesis by inhibiting excessive proliferation of endothelial cells. Can promote endothelial cell proliferation, survival and angiogenesis in adulthood. Its function in promoting cell proliferation seems to be cell-type specific. Promotes PGF-mediated proliferation of endothelial cells, proliferation of some types of cancer cells, but does not promote proliferation of normal fibroblasts (in vitro). Has very high affinity for VEGFA and relatively low protein kinase activity; may function as a negative regulator of VEGFA signaling by limiting the amount of free VEGFA and preventing its binding to KDR. Likewise, isoforms lacking a transmembrane domain, such as isoform 2, isoform 3 and isoform 4, may function as decoy receptors for VEGFA. Modulates KDR signaling by forming heterodimers with KDR. Ligand binding leads to the activation of several signaling cascades. Activation of PLCG leads to the production of the cellular signaling molecules diacylglycerol and inositol 1,4,5-trisphosphate and the activation of protein kinase C. Mediates phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase, leading to activation of phosphatidylinositol kinase and the downstream signaling pathway. Mediates activation of MAPK1/ERK2, MAPK3/ERK1 and the MAP kinase signaling pathway, as well as of the AKT1 signaling pathway. Phosphorylates SRC and YES1, and may also phosphorylate CBL. Isoform 1 phosphorylates PLCG. Promotes phosphorylation of AKT1 at 'Ser-473'. Promotes phosphorylation of PTK2/FAK1. Isoform 7 has a truncated kinase domain; it increases phosphorylation of SRC at 'Tyr-418' by unknown means and promotes tumor cell invasion.



Ubiquitinated after VEGFA-mediated autophosphorylation, leading to proteolytic degradation.

Autophosphorylated on tyrosine residues upon ligand binding. Autophosphorylation occurs in trans, i.e. one subunit of the dimeric receptor phosphorylates tyrosine residues on the other subunit. Phosphorylation at Tyr-1169 is important for interaction with PLCG. Phosphorylation at Tyr-1213 is important for interaction with PIK3R1, PTPN11, GRB2, and PLCG. Phosphorylation at Tyr-1333 is important for endocytosis and for interaction with CBL, NCK1 and CRK. Is probably dephosphorylated by PTPRB.

Subcellular Location:

Cell membrane>Single-pass type I membrane protein. Endosome.
Note: Autophosphorylation promotes ubiquitination and endocytosis.







Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Detected in normal lung, but also in placenta, liver, kidney, heart and brain tissues. Specifically expressed in most of the vascular endothelial cells, and also expressed in peripheral blood monocytes. Isoform 2 is strongly expressed in placenta. Isoform 3 is expressed in corneal epithelial cells (at protein level). Isoform 3 is expressed in vascular smooth muscle cells (VSMC).

Subunit Structure:

Interacts with VEGFA, VEGFB and PGF. Monomer in the absence of bound VEGFA, VEGFB or PGF. Homodimer in the presence of bound VEGFA, VEGFB and PGF. Can also form a heterodimer with KDR. Interacts (when tyrosine phosphorylated) with CBL, CRK, GRB2, NCK1, PIK3R1, PLCG, PSEN1 and PTPN11. Probably interacts also with PTPRB. Interacts with RACK1. Identified in a complex with CBL and CD2AP.


The second and third Ig-like C2-type (immunoglobulin-like) domains are sufficient for VEGFA binding.

Belongs to the protein kinase superfamily. Tyr protein kinase family. CSF-1/PDGF receptor subfamily.

Research Fields

· Cellular Processes > Cellular community - eukaryotes > Focal adhesion.   (View pathway)

· Environmental Information Processing > Signal transduction > MAPK signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > Ras signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > Rap1 signaling pathway.   (View pathway)

· Environmental Information Processing > Signaling molecules and interaction > Cytokine-cytokine receptor interaction.   (View pathway)

· Environmental Information Processing > Signal transduction > HIF-1 signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > PI3K-Akt signaling pathway.   (View pathway)

· Human Diseases > Cancers: Overview > Transcriptional misregulation in cancer.

· Human Diseases > Immune diseases > Rheumatoid arthritis.


1). Glucagon Enhances Chemotherapy Efficacy By Inhibition of Tumor Vessels in Colorectal Cancer. Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2024 (PubMed: 38072640) [IF=15.1]

2). Ethoxy-erianin phosphate and afatinib synergistically inhibit liver tumor growth and angiogenesis via regulating VEGF and EGFR signaling pathways. Toxicology and Applied Pharmacology, 2022 (PubMed: 35143806) [IF=3.8]

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