CST4 - cystatin S Gene

Homo sapiens

Gene ID: 1472 | Gene type: protein coding

About CST4

Cytogenetic location: 20p11.21 Genomic coordinates (GRCh38): 20:23,685,640-23,689,038 (from NCBI)

This gene has 1 transcript (splice variant), 97 orthologues and 11 paralogues. Restricted expression toward salivary gland (RPKM 5781.4).

Summary

The cystatin superfamily encompasses proteins that contain multiple cystatin-like sequences. Some of the members are active cysteine Protease Inhibitors, while Others have lost or perhaps never acquired this inhibitory activity. There are three inhibitory families in the superfamily, including the type 1 cystatins (stefins), type 2 cystatins and the kininogens. The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions. The cystatin locus on chromosome 20 contains the majority of the type 2 cystatin genes and pseudogenes. This gene is located in the cystatin locus and encodes a type 2 salivary cysteine peptidase inhibitor. The protein is an S-type cystatin, based on its high level of expression in saliva, tears and seminal plasma. The specific role in these fluids is unclear but Antibacterial and Antiviral activity is present, consistent with a protective function. [provided by RefSeq, Jul 2008]

CST4 Products(1)

mRNA	Protein	Name
NM_001899.3	NP_001890.1	cystatin-S precursor

Gene Ontology

Molecular Function
Biological Process
Cellular Component

Molecular Function GO Annotation	Evidence	Reference	Source
enables cysteine-type endopeptidase inhibitor activity	IDA IDA: Inferred from direct assay	3488317	GOA
enables protein binding	IPI IPI: Inferred from physical interaction	32296183	GOA

Biological Process GO Annotation	Evidence	Reference	Source
involved in detection of chemical stimulus involved in sensory perception of bitter taste	IDA IDA: Inferred from direct assay	24248522	GOA
involved in negative regulation of proteolysis	IDA IDA: Inferred from direct assay	3488317	GOA

Cellular Component GO Annotation	Evidence	Reference	Source
located in extracellular space	IDA IDA: Inferred from direct assay	3488317	GOA

EXP: Inferred from Experiment IDA: Inferred from direct assay IPI: Inferred from physical interaction IMP: Inferred from mutant phenotype IGI: Inferred from genetic interaction IEP: Inferred from expression pattern

CST4 Protein Structure

Cystatin

0
100
141 a.a.

Protein Preferred Names

Protein Names

cystatin-S

cystatin 4

CST4 Protein-protein interaction Information

Type Cross Intra	Protein Name	Protein ID	Interactor	Interactor Species	Interactor ID	Detection Method	Reference
Intra	CST4	P01036	UBQLN2	Homo sapiens	Q9UHD9	Validated Y2H	32296183
Intra	CST4	P01036	UBQLN2	Homo sapiens	Q9UHD9	Y2H Array	32296183

Cross: Cross-species interaction Intra: Intraspecies interaction

Recombinant CST4 Proteins

Cat. No.	Product Name	Accession	Purity
HY-P7866	Cystatin S/CST4 Protein, Human (HEK293, His)	P01036 (S21-A141)	≥95%

Related Diseases

Diseases

Alias

Blepharitis

Cerebral Amyloid Angiopathy, Cst3-Related

Cerebral Amyloid Angiopathy	Hereditary Cerebral Hemorrhage With Amyloidosis
Hchwa	Hereditary Cystatin C Amyloid Angiopathy
Cerebral Amyloid Angiopathy, Familial	Amyloidosis, Cerebroarterial, Icelandic Type
Amyloidosis Vi	Cerebral Hemorrhage, Hereditary, With Amyloidosis
Cst3-Related Cerebral Amyloid Angiopathy	Cerebral Hemorrhage, Hereditary, With Amyloidosis, Icelandic Variant
Hereditary Cerebral Hemorrhage With Amyloidosis, Icelandic Variant	Caa, Familial
Cerebral Amyloid Angiopathy, Genetic	Acys Amyloidosis
Cst3-Related Amyloidosis	Cystatin Amyloidosis
Hchwa, Icelandic Type	Hereditary Cerebral Hemorrhage With Amyloidosis, Icelandic Type
Amyloidosis 6	AMYL6
Acys	Caa
Cerebral Amyloid Angiopathy Cst3-Related	Cerebroarterial Amyloidosis Icelandic Type
Cystatin C Amyloidosis	Hccaa
Hchwai	Hchwa-I
Hereditary Cerebral Hemorrhage With Amyloidosis Icelandic Type	Cerebral Amyloid Angiopathy Familial
Angiopathy, Amyloid, Cerebral, Cst3-Related	Hereditary Cerebral Amyloid Angiopathy, Icelandic Type
Familial Cerebral Amyloid Angiopathy	Cerebral Amyloid Angiopathy, Hereditary

Tick Paralysis

Unverricht-Lundborg Syndrome

Unverricht-Lundborg Disease	Epm1
Myoclonic Epilepsy Of Unverricht And Lundborg	Myoclonus Progressive Epilepsy Of Unverricht And Lundborg
Unverricht - Lundborg Disease	Unverricht'S Disease
Epilepsy, Progressive Myoclonic Type 1	Epilepsy, Progressive Myoclonus 1
Progressive Myoclonus Epilepsy Baltic Myoclonic Epilepsy	Baltic Myoclonic Epilepsy
Baltic Myoclonus	Baltic Myoclonus Epilepsy
Lundborg-Unverricht Syndrome	Mediterranean Myoclonic Epilepsy
Pme	Progressive Myoclonic Epilepsy
Progressive Myoclonus Epilepsy 1	Uld
Myoclonic Epilepsies, Progressive

Root Caries

Cementum Caries

Dental Caries Of Root Surface

Progressive Myoclonus Epilepsy

Pme	Progressive Myoclonic Epilepsy
Myoclonic Epilepsies, Progressive	Unverricht-Lundborg Syndrome

Diseases	Alias
Waldenstroem'S Macroglobulinemia	Waldenstroem'S Macroglobulinemia Waldenstroem'S Macroglobulinemia Macroglobulinemia Of Waldenstrom Lymphoplasmacytic Lymphoma With Igm Gammopathy Lymphoplasmacytic Lymphoma Waldenstroem'S Macroglobulinemia Waldenstroem'S Macroglobulinemia Macroglobulinemia Of Waldenstrom Lymphoplasmacytic Lymphoma With Igm Gammopathy Lymphoplasmacytic Lymphoma

Related Agents

Pre-clinical Phase

Bioactive Molecules (1)

Cat. No.	Product Name	Effect	Purity	Rare Diseases
HY-RS03265	CST4 Human Pre-designed siRNA Set A	Pre-designed Sets	/	Unkown

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