a-2-binding peptide

A2-Binding peptide has involved in the assembly of MHC Class I molecules.

PKA inhibitor fragment (6-22) amide Acetate 是一种通过结合底物位点选择性抑制PKA 活性的合成肽(IC50 < 2 nM)。

Tat-NR2BAA is an inactive control peptide of Tat-NR2B9c. It shares a similar sequence with Tat-NR2B9c, but possesses a double-point mutation in the COOH terminal tSXV motif. This mutation renders Tat-NR2BAA unable to bind PSD-95. Tat-NR2B9c, on the other hand, is a membrane-permeable peptide that interferes with PSD-95/NMDAR binding. This interference leads to the decoupling of NR2B- and/or NR2A-type NMDARs from PSD-95[1][2].

PAR2 (1-6) amide is a synthetic peptide agonist of proteinase-activated receptor 2 (PAR2) that corresponds to residues 1-6 of the amino terminal tethered ligand sequence of human PAR2 and residues 37-42 of the full-length sequence.1It binds to NCTC 2544 cells expressing human PAR2 (Ki= 9.64 μM in a radioligand binding assay) and induces calcium mobilization in the same cells (EC50= 0.075 μM).2PAR2 (1-6) amide (100 μM) reduces colony formation of A549 lung cancer cells.1It induces superoxide production and degranulation in isolated human eosinophils when used at a concentration of 500 μM.3PAR2 (1-6) amide (5 μmol/kg) induces tear secretion in rats when used in combination with amastatin .4 1.Bohm, S.K., Kong, W., Bromme, D., et al.Molecular cloning, expression and potential functions of the human proteinase-activated receptor-2Biochem. J.314(Pt 3)1009-1016(1996) 2.Kanke, T., Ishiwata, H., Kabeya, M., et al.Binding of a highly potent protease-activated receptor-2 (PAR2) activating peptide, [3H]2-furoyl-LIGRL-NH2, to human PAR2Br. J. Pharmacol.145(2)255-263(2005) 3.Miike, S., McWilliam, A.S., and Kita, H.Trypsin induces activation and inflammatory mediator release from human eosinophils through protease-activated receptor-2J. Immunol.167(11)6615-6622(2001) 4.Nishikawa, H., Kawai, K., Tanaka, M., et al.Protease-activated receptor-2 (PAR-2)-related peptides induce tear secretion in rats: Involvement of PAR-2 and non-PAR-2 mechanismsJ. Pharmacol. Exp. Ther.312(2)324-331(2005)

BMSpep-57, a potent macrocyclic peptide inhibitor, competitively disrupts the PD-1/PD-L1 interaction, demonstrating a significant inhibitory concentration (IC50) of 7.68 nM. It exhibits binding affinity towards PD-L1 with dissociation constants (Kd) of 19 nM and 19.88 nM in MicroScale Thermophoresis (MST) and Surface Plasmon Resonance (SPR) assays, respectively. This compound enhances T cell functionality by promoting Interleukin-2 (IL-2) production within Peripheral Blood Mononuclear Cells (PBMCs).

Tyrosinase-related Protein 2 (TRP-2) (181-188) is a peptide derived from the tyrosinase-related protein 2 (TRP-2), specifically corresponding to residues 180-188. It is the primary epitope within TRP-2 that is recognized by anti-B16 CTLs. Moreover, It is a peptide that conforms to the binding motif of the MHC class I H2-Kb.

Phytochelatin 2, a short plant peptide, serves as an essential metal-binding compound. Phytochelatins are a diverse group of plant compounds that play a crucial role in chelating metals, safeguarding against metal toxicity, and maintaining metal homeostasis.

Bivalirudin TFA 是20个氨基多肽，可逆地抑制凝血酶。

Nonapeptide-1 (Melanostatine-5) acetate salt，一种多肽类激素，是 MC1R 选择性拮抗剂 (Ki: 40 nM)。 Nonapeptide-1 acetate salt 是一种竞争性的α-MSH 拮抗剂，可有效抑制黑素细胞中 α-MSH 诱导的细胞内 cAMP 和黑素体扩散 (IC50分别为 2.5 nM 和 11 nM)。 Nonapeptide-1 acetate salt 抑制黑色素合成，可用于研究皮肤色素沉着和肾上腺类固醇生成的调节、皮肤癌。

GRGDSPK TFA (EMD 56574 TFA) 是一种含有精氨酸-甘氨酸-天冬氨酸 (RGD) 序列的多肽。作为竞争性且可逆的抑制剂，它能够抑制整联蛋白与纤连蛋白的结合，用于探究整联蛋白在骨形成及吸收过程中的功能。

M1145是一种选择性GAL2甘丙肽受体激动剂，具有6.55 nM的Ki值。与GAL1（Ki=587 nM）相比，M1145对GAL2的亲和力提高了90倍以上；与GAL3（Ki=497 nM）相比，其亲和力增加了76倍。M1145对于甘丙肽信号转导展现出加性效应。

Cyclotraxin B TFA 是一种环肽，是一种高效且选择性的 TrkB 抑制剂，且不会改变 BDNF 的结合。Cyclotraxin B TFA 非竞争性地抑制 BDNF 诱导的 TrkB 活性，IC50值为 0.30 nM。Cyclotraxin B TFA 可以穿越血脑屏障，并具有止痛和抗焦虑的行为作用。

IKKγ NBD 抑制肽 TFA 是一种高度特异性的NF-κB 抑制剂。IKKγ NBD 抑制肽 TFA 通过阻断 IKKγ/NEMO 结合域 (NBD) 与 IKKα 和 IKKβ 之间的相互作用，而阻断 TNF-α 诱导的NF-κB 激活。IKKγ NBD 抑制肽 TFA 可显著降低炎症、改善脑缺血所致的神经功能缺损。

hFSH-β-(33-53) TFA 是一种含有硫醇的肽，对应于第二个 FSH 受体结合域，是 FSHR(卵泡刺激素受体) 拮抗剂。hFSH-β-(33-53) TFA 抑制 FSH 与受体的结合，是 Sertoli 细胞中雌二醇合成的部分激动剂。

(Pro3) GIP, human ((Pro3)Gastric Inhibitory Peptide, human) 是一种有效、稳定和特异性的人 GIP 受体完全激动剂。(Pro3) GIP, human 对人 GIPR 具有高结合亲和力，Ki/ Kd 值为 0.90 nM。(Pro3) GIP, human 可用于肥胖相关糖尿病的研究。

Peptide E，作为kappa阿片受体激动剂，显示出显著的阿片受体结合活性，具IC50值为0.39 μM，适用于中枢神经系统研究。

Protein Kinase C (19-35) Peptide 是PKC 假底物抑制剂/区域。Protein Kinase C (19-35) Peptide 阻断PKC 激酶结构域的底物结合位点，使PKC 的细胞质形式失活。

Hepatitis B Virus Receptor Binding Fragment（hepatitis B peptide 4980）为一合成肽类似物，特异性结合Hep G2细胞。基于病毒中和粘附阻断理念，此Fragment可望激发保护性抗体生成，展现作为免疫原的巨大潜力。

ErbB-2-binding peptide (HER2-binding peptide)为具结合肿瘤功能的肽类，其在癌症研究中显示出应用潜力。

Methionylserine (H-MET-SER-OH) 是一种含有蛋氨酸和丝氨酸的二肽。Methionylserine 可与肠道二/三肽转运蛋白 1 (hPEPT1) 结合并易位，Km 值为 0.2 mM。Methionylserine 抑制ACE 酶的活性。Methionylserine 可用于高血压的研究。

PNC-28醋酸盐是源自p53蛋白mdm-2结合结构域的p53肽(残基17-26)，具备膜穿透蛋白序列。该化合物在胰腺癌研究中有应用。

TfR-T12 TFA为能穿透血脑屏障的转铁蛋白受体(TfR)结合肽，展现出纳摩尔级的结合活性。

Cyclo(Gly-Arg-Gly-Asp-Ser-Pro)（c(GRGDSP)）为RGD 抑制肽。该化合物作为合成的α5β1整联蛋白配体，能够竞争性阻断 invasin（Inv）与Caco-2细胞表面α5β1整联蛋白的相互结合。

TAT-CIRP为小肽，指Tat融合的冷诱导RNA结合蛋白。作为骨髓分化蛋白2（MD2）的抑制剂，该化合物对小鼠缺血性及出血性中风显示出显著的神经保护效果。