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FLASH GENE

Symbol

CIZ1

contributors: mct - updated : 05-03-2019

HGNC name	CDKN1A interacting zinc finger protein 1
HGNC id	16744

FLASH GENE DNA RNA EXPRESSION PROTEIN DISORDER ANIMAL & CELL MODELS

PROTEIN

PHYSICAL PROPERTIES

STRUCTURE

motifs/domains	polyglutamine repeats and glutamine-rich region in the N terminus, and N-terminal replication domain
	three zinc finger motifs and one MH3 (matrin 3 homologous domain 3) in the C terminal region, with C-terminal nuclear matrix anchor , and this nuclear matrix anchor domain is responsible for its interaction with YAP1

HOMOLOGY

interspecies

homolog to Fugu rubripes 1,linked to surfeit gene

Homologene

FAMILY

CATEGORY

regulatory

SUBCELLULAR LOCALIZATION	intracellular
	intracellular,nucleus,nucleoplasm

basic FUNCTION	regulating the subcellular localization of CIP/WAP1
	functions to promote DNA replication after replication complex formation, suggesting that CIZ1 splicing contributes to the regulation of DNA replication during development
	stimulates initiation of mammalian DNA replication and is normally tethered to the nuclear matrix within DNA replication foci
	participates in the regulation of the cell cycle in estrogen-stimulated breast cancer cells
	DNA-binding factor, coregulating ESR1 by enhancing ESR1 transactivation activity by promoting the recruitment of the ESR1 complex to the target gene chromatin
	stimulates DNA replication and is required for mammalian cells to enter S phase
	CIZ1 functions as a tumor suppressor
	CIZ1 may be involved in colon cancer progression by regulating cell proliferation, cell cycle, apoptosis and colony formation
	numerous biological functions of CIZ1 in DNA replication, cell proliferation, and differentiation
	is a positive regulator of YAP1 signaling
	CIZ1 may be involved in the post-mitotic differentiation of neurons in response to external signals
	may contribute to oncogenesis by induction of DNA replication stress and CIZ1 may be a multifaceted target in cancer therapy
	promotes DNA replication in association with cyclins and has been linked to adult and pediatric cancers
	plays a critical role in DNA replication and cell-cycle progression at the G1/S checkpoint
	promotes cyclin-dependent DNA replication and resides in sub-nuclear foci that are part of the protein nuclear matrix (NM), and in RNA assemblies that are enriched at the inactive X chromosome (Xi) in female cells
	possible positive role of CIZ1 in endothelial cell proliferation and migration

CELLULAR PROCESS

PHYSIOLOGICAL PROCESS

text	cell cycle control

PATHWAY

metabolism

signaling

a component

INTERACTION

DNA

RNA

small molecule	metal binding,
	zinc Zn2+

protein	CIP1 (CDKN1A) interacting
	estrogen-responsive gene
	interactor of ERH, is also a nuclear zinc finger protein interacting with CDKN1A, a universal inhibitor of cyclin-dependent kinases, and is a DNA replication factor (interaction with ERH could block the binding of CDKN1A by CIZ1 in the cell)
	nuclear matrix protein that cooperates with cyclin A2 (encoded by CCNA2) and CDK2 to promote mammalian DNA replication
	CIZ1 enhanced the interaction between YAP1 and TEAD1
	has likely an essential role in anchoring XIST to the nuclear matrix in specific somatic lineages
	DHX9 shares common functions with CIZ1, including interaction with XIST long-non-coding RNA, epigenetic maintenance and regulation of DNA replication
	DHX9-CIZ1 are required for efficient cell cycle progression at the G1/S transition and that nucleolar recruitment is integral to their mechanism of action

cell & other

REGULATION

ASSOCIATED DISORDERS

corresponding disease(s)

DTPC2

Other morbid association(s)

Type Gene Modification Chromosome rearrangement Protein expression Protein Function tumoral         aberrantly expressed in Ewing sarcoma constitutional     --over   more highly expressed in Alzheimer tissue than in healthy brains constitutional     --over   in hemangioma of the tongue while its expression is minimal in the normal tongue tissues

Susceptibility

Variant & Polymorphism

Candidate gene
Marker	variant CIZ1 is a strong candidate for a cancer-specific single marker capable of identifying early-stage lung cancer within at-risk groups without resort to invasive procedures
	overexpression of CIZ1 may contribute to the growth and angiogenesis of lung squamous cell carcinoma (LSCC), thus CIZ1 could represent a biomarker for diagnosis and a target for therapeutic intervention
Therapy target
	System Type Disorder Pubmed cancer digestive liver CIZ1 might be a therapeutic target for HCC

ANIMAL & CELL MODELS

	germline knockout of Ciz1 is associated with motor and hematological abnormalities in young adult mice
	Ciz1(-/-) mice did not manifest dystonia, but exhibited mild motoric abnormalities on balance, open-field activity, and gait