Enables the transmembrane transfer of a cation by a channel that opens when intracellular cyclic nucleotide has been bound by the channel complex or one of its constituent parts.

Enables the transmembrane transfer of an ion by a channel that opens when a cyclic nucleotide has been bound by the channel complex or one of its constituent parts.

Enables the transmembrane transfer of a cation by a channel that opens when intracellular cAMP has been bound by the channel complex or one of its constituent parts.

Enables the transmembrane transfer of a cation by a channel that opens when intracellular cGMP has been bound by the channel complex or one of its constituent parts.

Enables the transmembrane transfer of an anion by a volume-sensitive channel. An anion is a negatively charged ion. A volume-sensitive channel is a channel that responds to changes in the volume of a cell.

OBSOLETE. The membrane organization process that joins two lipid bilayers to form a single membrane, involving more than one organism.

Enables the calcium concentration-regulatable energy-independent passage of cations across a lipid bilayer down a concentration gradient.

Enables the transmembrane transfer of a solute by a channel that opens in response to a specific ion stimulus.

Enables the transmembrane transfer of potassium by a channel that opens in response to stimulus by a sodium ion or ions. Transport by a channel involves facilitated diffusion of a solute (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel, without evidence for a carrier-mediated mechanism. Sodium activated potassium channels have distinctive properties, including a large single channel conductance, subconductance states, and a block of single channel currents at positive potentials, similar to inward rectification.

OBSOLETE. A process which results in the assembly, arrangement of constituent parts, or disassembly of a membrane, involving more than one organism.

Enables the transmembrane transfer of chloride by a channel that opens in response to stimulus by a calcium ion or ions. Transport by a channel involves catalysis of facilitated diffusion of a solute (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel, without evidence for a carrier-mediated mechanism.

Enables the transmembrane transfer of chloride across the membrane of an intracellular compartment. Transport by a channel involves catalysis of facilitated diffusion of a solute (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel, without evidence for a carrier-mediated mechanism.

A form of autophagy, by which damaged or non-essential parts of the nucleus, or even an entire nucleus is degraded.

A type of nucleophagy, distinct from piecemeal microautophagy of the nucleus (PNM) where the nuclear material is delivered to the vacuole/lysosome for breakdown and recycling later than observed for PNM.

The process by which G-quadruplex (also known as G4) DNA, which is a four-stranded DNA structure held together by guanine base pairing, is unwound or 'melted'.

The process in which a transformation is induced in the geometry of a DNA double helix, resulting in a change in twist, writhe, or both, but with no change in linking number. Includes the unwinding of double-stranded DNA by helicases.