Prab: CSV import

2025-03-17T02:57:18Z

CSV import

← Older revision		Revision as of 02:57, 17 March 2025
Line 31:		Line 31:
	[[Category:Drug resistance]]		[[Category:Drug resistance]]
	{{No image}}		{{No image}}
			__NOINDEX__

Prab: CSV import

2025-02-10T04:55:01Z

CSV import

← Older revision		Revision as of 04:55, 10 February 2025
Line 30:		Line 30:
	[[Category:Human proteins]]		[[Category:Human proteins]]
	[[Category:Drug resistance]]		[[Category:Drug resistance]]
			{{No image}}

Prab: CSV import

2024-11-28T04:51:35Z

CSV import

New page

{{Short description|An overview of the ABCC4 protein and its role in human physiology}}

'''ABCC4''' (ATP-binding cassette, sub-family C, member 4), also known as '''Multidrug Resistance Protein 4''' ('''MRP4'''), is a protein that in humans is encoded by the '''ABCC4''' gene. This protein is a member of the [[ATP-binding cassette transporter|ATP-binding cassette (ABC) transporters]] superfamily, which is one of the largest and most diverse protein families involved in the transport of various molecules across extra- and intra-cellular membranes.

==Structure==
The ABCC4 protein is composed of multiple transmembrane domains and two nucleotide-binding domains. These domains are responsible for the transport of substrates across the cell membrane, utilizing the energy derived from ATP hydrolysis. The structure of ABCC4 is typical of the [[ABC transporter|ABC transporter family]], characterized by its ability to bind and hydrolyze ATP to drive the transport process.

==Function==
ABCC4 functions primarily as an efflux pump, transporting a wide range of substrates, including [[nucleoside analogs]], [[prostaglandins]], and [[cyclic nucleotides]], out of cells. This activity is crucial in the regulation of intracellular concentrations of these molecules, impacting various physiological processes such as [[inflammation]], [[immune response]], and [[cell signaling]].

===Role in Drug Resistance===
ABCC4 is implicated in [[multidrug resistance]], a phenomenon where cancer cells become resistant to a variety of chemotherapeutic agents. By actively exporting drugs out of cells, ABCC4 reduces their intracellular concentrations, thereby diminishing their efficacy. This has significant implications for the treatment of [[cancer]], as overexpression of ABCC4 can lead to treatment failure.

==Clinical Significance==
Mutations in the ABCC4 gene have been associated with various diseases, including [[Dubin-Johnson syndrome]], a rare liver disorder. Additionally, ABCC4 is a target for pharmacological intervention in conditions such as [[cancer]], [[HIV]], and [[cardiovascular diseases]], where modulation of its activity could enhance therapeutic outcomes.

==Research Directions==
Ongoing research is focused on understanding the regulatory mechanisms controlling ABCC4 expression and activity, as well as developing inhibitors that can selectively block its function. Such inhibitors have the potential to overcome drug resistance in cancer therapy and improve the efficacy of existing treatments.

==Also see==
* [[ATP-binding cassette transporter]]
* [[Multidrug resistance]]
* [[Cancer therapy]]
* [[Dubin-Johnson syndrome]]

{{ABC transporters}}
{{Drug resistance}}

[[Category:ABC transporters]]
[[Category:Human proteins]]
[[Category:Drug resistance]]

ABCC4 - Revision history

Prab: CSV import

Prab: CSV import

Prab: CSV import