1. Recombinant Proteins
  2. Immune Checkpoint Proteins
  3. Inhibitory Checkpoint Molecules
  4. FGL-1
  5. FGL1 Protein, Human (HEK293, mFc)

FGL1 Protein, Human (HEK293, mFc)

Cat. No.: HY-P70740
COA Handling Instructions

FGL1 protein is the main ligand of LAG3 and can inhibit antigen-specific T cell activation, mediating the inhibitory function of LAG3 independently of MHC-II binding. FGL1 is secreted by liver cells and contributes to their growth. FGL1 Protein, Human (HEK293, mFc) is the recombinant human-derived FGL1 protein, expressed by HEK293 , with C-mFc labeled tag.

For research use only. We do not sell to patients.

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Description

FGL1 protein is the main ligand of LAG3 and can inhibit antigen-specific T cell activation, mediating the inhibitory function of LAG3 independently of MHC-II binding. FGL1 is secreted by liver cells and contributes to their growth. FGL1 Protein, Human (HEK293, mFc) is the recombinant human-derived FGL1 protein, expressed by HEK293 , with C-mFc labeled tag.

Background

FGL1 protein functions as an immune suppressive molecule, exerting inhibitory effects on antigen-specific T-cell activation by serving as a major ligand for LAG3. It plays a pivotal role in mediating LAG3's T-cell inhibitory function independently of MHC class II (MHC-II) binding. Beyond its immune-regulatory role, FGL1 is secreted by hepatocytes, contributing to their growth. Existing as a homodimer, FGL1 interacts with LAG3 through its Fibrinogen C-terminal domain, specifically binding to LAG3's Ig-like domains 1 and 2. This molecular interaction, detailed in studies, underscores the significance of FGL1 in modulating immune responses and hepatocyte growth, highlighting its potential as a key player in the regulation of T-cell activation and hepatic functions.

Biological Activity

Measured by its binding ability in a functional ELISA. When Recombinant Human LAG-3 (HY-P70723) is immobilized at 1 µg/mL (100 µL/well) can bind Recombinant Human FGL1.The ED50 of Recombinant Human FGL1-mFc is <2 μg/mL.

Species

Human

Source

HEK293

Tag

C-mFc

Accession

Q08830 (L23-I312)

Gene ID
Molecular Construction
N-term
FGL1 (L23-I312)
Accession # Q08830
mFc
C-term
Synonyms
Fibrinogen-like protein 1; FGL1; HP-041; Hepassocin; HFREP-1; LFIRE-1
AA Sequence

LEDCAQEQMRLRAQVRLLETRVKQQQVKIKQLLQENEVQFLDKGDENTVIDLGSKRQYADCSEIFNDGYKLSGFYKIKPLQSPAEFSVYCDMSDGGGWTVIQRRSDGSENFNRGWKDYENGFGNFVQKHGEYWLGNKNLHFLTTQEDYTLKIDLADFEKNSRYAQYKNFKVGDEKNFYELNIGEYSGTAGDSLAGNFHPEVQWWASHQRMKFSTWDRDHDNYEGNCAEEDQSGWWFNRCHSANLNGVYYSGPYTAKTDNGIVWYTWHGWWYSLKSVVMKIRPNDFIPNVI

Molecular Weight

Approximately 58-68 kDa due to the glycosylation.

Purity

Greater than 95% as determined by reducing SDS-PAGE.

Appearance

Lyophilized powder.

Formulation

Lyophilized a 0.22 μm filtered solution of PBS, 5% Thehalose, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O.

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

FGL1 Protein, Human (HEK293, mFc) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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FGL1 Protein, Human (HEK293, mFc)
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HY-P70740
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