多肽修飾
C-端標記技術
o C端酰胺化(Amidation,C-termainal)
o 醛基化(Aldehydes)
o 醇基化(Alcohols)
o pNA (p-Nitroanilide)
o AMC
o AFC
o 巰基乙胺化(Cysteamide)
o 酯基化(Ester)
o N-烷基化(N-Alkyl Amides)
N-端標記技術
o 乙?;疉cetylated (Acetylated)
o Palmytolyl
o HYNIC
o 生物素標記(Biotinylated)
o Br乙?;˙romoacetylated)
o 螯合反應(DOTA,DTPA conjugated)
o 甲醛化(Formylated)
o 十四烷基,十八烷基化(Myristoylated)
o 琥珀?;?、棕櫚酸化、蘋果酸化、脂肪酸化等(Succinylated)
熒光標記修飾
o C端修飾
AFC, AMC, Dap(Dnp), Lys(Dye), pNA, Rh110
o N端修飾
Bodipy-FL, Cy3, Cy5, Texas Red, 5-Tamra, 5-lodoacetamido fluorescein
Rhodamine 110 and Rhodamine B Luciferin, EDANS
FAM, FITC, MCA, Rox, Sulforhodamine 101, 5-TAMRA
環化反應
o 首尾成環,中間成環,特殊成環(N -> C or Head to Tail)
o 2對二硫鍵,3對二硫鍵(Disulfide (S-S bond formation) .Trisulfide formation)
o 天然產物活性肽成環(Cyclic-natural peptides
甲基化
o 側鏈甲基化Lys(For),Lys(Me), Lys(Me)2, Lys(Me)3, Arg(Me)2 symmetrical, Arg(Me)2 asymmetrical,
D-Tyr(Me),D-Tyr(Et)
o N端甲基化(N-Me-Arg,N-Me-Asp, N-Me-Glu, N-Me-Leu, N-Me-Nle, N-Me-Nva,
N-Me-Phe, N-Me-S N-Me-Ser, N-Me-Trp, N-Me-Thr, N-Me-Val)
幾種常見的特殊修飾
o 各種偶聯(BSA, KLH conjugated peptides for antibody production )
o 磷酸化(Phosphoserine, Phosphothreonine, Phosphotyrosine)
o 磺化(Sulfated Tyrosine or Serine)
o MAPS (Multiple Antigenic Peptide)
o 糖肽(Glycopeptides)
o PEG修飾(PEGylation)