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The nuclear envelope consists of two lipid bilayer membranes: an inner nuclear membrane and an outer nuclear membrane. [4] The space between the membranes is called the perinuclear space. It is usually about 10–50 nm wide. [5] [6] The outer nuclear membrane is continuous with the endoplasmic reticulum membrane. [4]
Inner nuclear membrane proteins (INM proteins) are membrane proteins that are embedded in or associated with the inner membrane of the nuclear envelope. There are about 60 INM proteins, most of which are poorly characterized with respect to structure and function. [ 2 ]
The linker of nucleoskeleton and cytoskeleton (LINC) complex is a protein complex associated with both inner and outer membranes of the nucleus. It is composed of SUN-domain proteins and KASH-domain proteins. The SUN-domain proteins are membrane-embedded proteins within the inner nuclear membrane (INM).
The nuclear lamina is associated with the inner face of the inner nuclear membrane of the nuclear envelope, whereas the outer face of the outer nuclear membrane is continuous with the endoplasmic reticulum. [1] The nuclear lamina is similar in structure to the nuclear matrix, that extends throughout the nucleoplasm.
The outer nuclear membrane is continuous with the rough endoplasmic reticulum membrane, and like that structure, features ribosomes attached to the surface. The outer membrane is also continuous with the inner nuclear membrane since the two layers are fused together at numerous tiny holes called nuclear pores that perforate the nuclear envelope.
The nuclear envelope consists of two membranes, an inner and an outer nuclear membrane, perforated by nuclear pores. [10]: 649 Together, these membranes serve to separate the cell's genetic material from the rest of the cell contents, and allow the nucleus to maintain an environment distinct from the rest of the cell. Despite their close ...
Nuclear lamins interact with inner nuclear membrane proteins to form the nuclear lamina on the interior of the nuclear envelope. Lamins have elastic and mechanosensitive properties, and can alter gene regulation in a feedback response to mechanical cues. [ 1 ]
The nuclear envelope is composed of two lipid bilayer membranes that are penetrated by nuclear pores and separated by a small intermembrane space, which is often called the perinuclear space. [12] The perinuclear space is usually about 20-40 nm wide. [ 13 ]