Ki-67(MKI67) Protein, Human (His)

Ki67/MKI67 is localized on mitotic chromosomes and maintains its dispersion during nuclear envelope disassembly. It covers a large portion of the chromosome surface and prevents chromatin from collapsing into clumps. Ki-67 (MKI67) Protein, Human (His) is the recombinant mouse-derived Ki-67(MKI67) protein, expressed by E. coli , with N-6*His labeled tag. The total length of Ki-67 (MKI67) Protein, Human (His) is 293 a.a., with molecular weight of 36.7 kDa.

The Ki67/MKI67 protein is essential for maintaining the dispersion of individual mitotic chromosomes in the cytoplasm following nuclear envelope disassembly. Positioned on the surface of the mitotic chromosome, specifically within the perichromosomal layer, Ki67/MKI67 covers a significant fraction of the chromosome surface, preventing the collapse of chromosomes into a singular chromatin mass. Functioning as a surfactant with a high net electrical charge, it establishes a steric and electrostatic charge barrier, facilitating independent chromosome motility. Ki67/MKI67 exhibits DNA-binding capabilities, displaying a preference for supercoiled DNA and AT-rich DNA. While it does not contribute to the internal structure of mitotic chromosomes, its role in chromatin organization remains uncertain, raising the possibility that this may be an indirect consequence of its primary function in maintaining dispersed mitotic chromosomes. The protein interacts with various partners, including KIF15, NIFK, PPP1CC, and forms part of a complex involving ZNF335, HCFC1, CCAR2, EMSY, RBBP5, ASH2L, and WDR5, suggesting its involvement in intricate cellular processes and molecular networks.

Mouse

E. coli

N-6*His

P46013 (V2962-E3254)

4288  [NCBI]

VLRAPKVEPVGDVVSTRDPVKSQSKSNTSLPPLPFKRGGGKDGSVTGTKRLRCMPAPEEIVEELPASKKQRVAPRARGKSSEPVVIMKRSLRTSAKRIEPAEELNSNDMKTNKEEHKLQDSVPENKGISLRSRRQNKTEAEQQITEVFVLAERIEINRNEKKPMKTSPEMDIQNPDDGARKPIPRDKVTENKRCLRSARQNESSQPKVAEESGGQKSAKVLMQNQKGKGEAGNSDSMCLRSRKTKSQPAASTLESKSVQRVTRSVKRCAENPKKAEDNVCVKKIRTRSHRDSE

36.7kDa

Greater than 90% as determined by SDS-PAGE.