KR-12 (human) TFA
人类抗菌肽 LL-37 的最小抗菌活性片段(对应 LL-37 第 18-29 位氨基酸)
| 规格 | 价格 | 货期 | 数量 |
|---|---|---|---|
| 10mg | ¥2500.00 | 5-10工作日发货 |
特色产品
- 用于免疫印迹和质谱分析等后续操作
- 适用于30 KDa-130 KDa大小的蛋白
- 可将信号灵敏度提高100倍
- 同时保持稳定的特异性和分辨率
- 提供更高的转录效率并抑制免疫激活
- 使用5-moUTP和Cy5-utp修饰
产品描述
KR-12 (CAS 1218951-51-9) 是人类抗菌肽 LL-37 的最小抗菌活性片段(对应第 18–29 位氨基酸,序列:KRIVQRIKDFLR),可靶向细菌阴离子细胞膜,通过破坏膜结构、诱导阴离子脂质簇集与膜穿孔发挥抗菌作用,并能以 Asp²⁶、Arg²⁹ 为关键位点结合 Cu (II) 离子;该片段兼具窄谱抗菌、抑制生物膜形成、中和内毒素(LPS)、抗炎、免疫调节、促骨生成及伤口修复等生物学功能。野生型 KR-12 对大肠杆菌 K12、白色念珠菌、金黄色葡萄球菌、大肠杆菌 ATCC25922 及多重耐药鲍曼不动杆菌的 MIC 分别为 64 μM、5 μg/mL、8.4 μg/mL、2.1 μg/mL 与 128–256 μg/mL。细胞水平主要用于体外药敏、膜穿透及抗生物膜实验(测试浓度 0.25–64 μg/mL),≤128 μg/mL 对人角质形成细胞、HEK293 等哺乳动物细胞无明显毒性;动物水平仅用于疾病模型治疗,适用于 TNBS/DSS 诱导结肠炎、细菌诱导败血症 / 伤口感染、导管相关生物膜及骨植入感染等模型,结肠炎小鼠腹腔注射剂量为 1 mg/kg(急性)或 5 mg/kg(亚慢性 / 慢性,每日 2 次),败血症 / 伤口感染模型给药剂量为 5–40 mg/kg,局部外用浓度为 2 mg/mL。
参考文献:
[1] Mishra B, Epand RF, Epand RM, Wang G. Structural location determines functional roles of the basic amino acids of KR-12, the smallest antimicrobial peptide from human cathelicidin LL-37. RSC Adv. 2013 Nov 14;(42):10.1039/C3RA42599A. doi: 10.1039/C3RA42599A. PMID: 24307932; PMCID: PMC3844289.
[2] Feng X, Sambanthamoorthy K, Palys T, Paranavitana C. The human antimicrobial peptide LL-37 and its fragments possess both antimicrobial and antibiofilm activities against multidrug-resistant Acinetobacter baumannii. Peptides. 2013 Nov;49:131-7. doi: 10.1016/j.peptides.2013.09.007. Epub 2013 Sep 23. PMID: 24071034.
[3] Luo Y, McLean DT, Linden GJ, McAuley DF, McMullan R, Lundy FT. The Naturally Occurring Host Defense Peptide, LL-37, and Its Truncated Mimetics KE-18 and KR-12 Have Selected Biocidal and Antibiofilm Activities Against Candida albicans, Staphylococcus aureus, and Escherichia coli In vitro. Front Microbiol. 2017 Mar 31;8:544. doi: 10.3389/fmicb.2017.00544. PMID: 28408902; PMCID: PMC5374219.
[4] Fabisiak N, Fabisiak A, Chmielowiec-Korzeniowska A, Tymczyna L, Kamysz W, Kordek R, Bauer M, Kamysz E, Fichna J. Anti-inflammatory and antibacterial effects of human cathelicidin active fragment KR-12 in the mouse models of colitis: a novel potential therapy of inflammatory bowel diseases. Pharmacol Rep. 2021 Feb;73(1):163-171. doi: 10.1007/s43440-020-00190-3. Epub 2020 Nov 21. PMID: 33219923; PMCID: PMC7862075.
[5] Brzeski J, Wyrzykowski D, Makowska J. Application of a modern theoretical approach to the study of the interaction of KR-12 peptides derived from human cathelicidins with Cu(II) ions. Dalton Trans. 2024 Jun 10;53(23):9942-9951. doi: 10.1039/d4dt01027b. PMID: 38809157.
[6] Lakshmaiah Narayana J, Mechesso AF, Rather IIG, Zarena D, Luo J, Xie J, Wang G. Origami of KR-12 Designed Antimicrobial Peptides and Their Potential Applications. Antibiotics (Basel). 2024 Aug 28;13(9):816. doi: 10.3390/antibiotics13090816. PMID: 39334990; PMCID: PMC11429261.
产品性质
| CAS号 | 1218951-51-9 (free base) |
| 分子式 | C73H128F3N25O17 |
| 分子量 | 1684.97 |
| 化学名称 | (3S)-3-[[(2S)-6-amino-2-[[(2S,3S)-2-[[(2S)-2-[[(2S)-5-amino-2-[[(2S)-2-[[(2S,3S)-2-[[(2S)-2-[[(2S)-2,6-diaminohexanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-3-methylpentanoyl]amino]-3-methylbutanoyl]amino]-5-oxopentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-3-methylpentanoyl]amino]hexanoyl]amino]-4-[[(2S)-1-[[(2S)-1-[[(2S)-1-amino-5-(diaminomethylideneamino)-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-4-oxobutanoic acid;2,2,2-trifluoroacetic acid |
| SMILES | O=C(O)C[C@H](NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@H](N)CCCCN)=O)CCC/N=C(N)\N)=O)[C@@H](C)CC)=O)C(C)C)=O)CCC(N)=O)=O)CCC/N=C(N)\N)=O)[C@@H](C)CC)=O)CCCCN)=O)C(N[C@@H](CC1=CC=CC=C1)C(N[C@@H](CC(C)C)C(N[C@@H](CCC/N=C(N)\N)C(N)=O)=O)=O)=O.O=C(O)C(F)(F)F |
| 存储条件 | -20°C |
| 运输条件 | 蓝冰 |



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