MT1G

protein-coding

metallothionein 1G, the group of Metallothioneins

Gene summary

Enables zinc ion binding activity. Involved in several processes, including cellular response to cadmium ion; cellular response to copper ion; and cellular response to zinc ion. Located in cytoplasm and nucleus. [provided by Alliance of Genome Resources, Jul 2025]

Previous symbols:

MANE transcript

NM_001301267.2

Inheritance

—

ClinVar variants

U:22B:2

Top phenotype

—

gnomAD constraint

pLI —, LoF o/e 0.82

Max pathogenic AF

—

Genomic locus

chr16:56,666,730-56,668,065

External References & Databases

Ensembl (ENSG00000125144)

Transcript & Mutation Effects

hg38 • Region Span ~1.3 kb

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GenCC Phenotypes & Disease Associations

Curated gene-disease validity assertions and inheritance patterns

No GenCC data available for this gene.

ClinVar Associated Diseases & Phenotypes

Reported disease conditions connected to MT1G variants in ClinVar

1 Conditions Cataloged

not specifiedTotal: 19

ClinVar Variants & Pathogenicity by Type

Statistics based on transcript NM_001301267.2. Only rare variants are included.

We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.

Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.

Effect	PathogenicP	Likely pathogenicLP	VUS	Likely benignLB	BenignB	Sum
synonymous			1 clinvar			1
missense			18 clinvar	2 clinvar		20
nonsense						0
start loss						0
frameshift						0
splice donor/acceptor (+/-2bp)			3 clinvar			3
Total	0	0	22	2	0	24

Loading ClinVar variants...

Transcript Catalog

Annotated transcript isoforms across RefSeq and Ensembl databases

Showing 4 of 27 transcripts

Transcript ID	Source	Protein ID	Coding Exons	MANE Status
NM_001301267.2	RefSeq	NP_001288196.1	3	MANE Select
ENST00000379811.4	Ensembl	ENSP00000369139.4	3	MANE Select
NM_005950.3	RefSeq	NP_005941.1	3	Standard
ENST00000444837.6	Ensembl	ENSP00000391397.2	3	Standard

Gene Ontology (GO) Annotations & Pathways

Biological processes, molecular functions, cellular components and pathways

Pathways ConsensusPathDB

Mineral absorption - Homo sapiens (human)
Copper homeostasis
Zinc homeostasis
Response to metal ions
Cellular responses to external stimuli

Biological Process

cellular zinc ion homeostasis
detoxification of copper ion
monocyte differentiation
cellular response to vascular endothelial growth factor stimulus
monocyte activation

Molecular Function

protein binding
zinc ion binding
metal ion binding

Cellular Component

nucleus
cytoplasm
perinuclear region of cytoplasm

gnomAD Constraint

Source: gnomAD

Gene type: protein_coding
Transcript type: protein_coding
Transcript: ENST00000444837
Coding exons: 3
Length: 1335
Individuals with no LoFs: 125727
Homozygous LoFs: 0
Heterozygous LoFs: 11
Defined: 125738
p: 0.0000437

	Z-Score	Observed	Expected	Observed/Expected	Mutation Rate	Total Possible
Missense	-0.800	48	34.7	1.38	0.00000172	401
Missense (PolyPhen)
Synonymous	-0.185	15	14.1	1.06	8.70e-7	98
Loss of Function	0.262	2	2.44	0.819	1.03e-7	30

Population LoF Frequency

Population	CAF	p-value	Status
African	0.000062	0.000062	rare
Latino/Admixed American	0.000029	0.000029	rare
Ashkenazi Jewish	0	0.0	absent
East Asian	0	0.0	absent
Finnish	0	0.0	absent
European (Non-Finnish)	0.000070	0.000070	rare
South Asian	0	0.0	absent
Other	0.00016	0.00016	rare

dbNSFP Gene Annotations

Source: dbNSFP

Function: FUNCTION: Metallothioneins have a high content of cysteine residues that bind various heavy metals; these proteins are transcriptionally regulated by both heavy metals and glucocorticoids.;

Intolerance Scores

RVIS EVS: 0.06
RVIS percentile EVS: 58

Essentials

Essential (CRISPR): N
Essential (CRISPR2): N
Essential (gene trap): N
Indispensability pred.: E
Indispensability score: 0.539

Gene Damage Prediction

	All	Recessive	Dominant
Mendelian	Medium	Medium	Medium
Primary Immunodeficiency	Medium	Medium	Medium
Cancer	Medium	Medium	Medium