BTBD18

BTB domain containing 18, the group of BTB domain containing

Basic information

Region (hg38): 11:57743514-57752675

Links

ENSG00000233436 ∙ NCBI:643376 ∙ ∙ HGNC:37214 ∙ Uniprot:B2RXH4 ∙ AlphaFold ∙ GenCC ∙ jax ∙ Sfari ∙ GnomAD ∙ Pubmed ∙ ClinVar

Phenotypes

GenCC

Source: genCC

No genCC data.

ClinVar

This is a list of variants' phenotypes submitted to ClinVar and linked to the BTBD18 gene.

Variants pathogenicity by type

Statistics on ClinVar variants can assist in determining whether a specific variant type in the BTBD18 gene is commonly pathogenic or not.

In the table, we include only reliable ClinVar variants with their consequences to MANE Select, Mane Plus Clinical transcripts, or transcripts with TSL equals 1. Click the count to view the source variants.

Warning: slight differences between displayed counts and the number of variants in ClinVar may occur, primarily due to (1) the application of a different transcript and/or consequence by our variant effect predictor or (2) differences in clinical significance: we classify Benign/Likely benign variants as Likely benign and Pathogenic/Likely pathogenic variants as Likely pathogenic.

Variant type	Pathogenic	Likely pathogenic	VUS	Likely benign	Benign	Sum
synonymous						0
missense			51	3		54
nonsense						0
start loss						0
frameshift						0
inframe indel						0
splice donor/acceptor (+/-2bp)						0
splice region						0
non coding						0
Total	0	0	51	3	0

Variants in BTBD18

This is a list of pathogenic ClinVar variants found in the BTBD18 region.

You can filter this list by clicking the number of variants in the Variants pathogenicity by type table.

Position	Type	Phenotype	Significance	ClinVar
11-57744166-C-T		not specified	Uncertain significance (Dec 03, 2024)
11-57744195-A-G		not specified	Uncertain significance (Nov 03, 2023)
11-57744286-C-G		not specified	Uncertain significance (Mar 23, 2023)
11-57744417-G-T		not specified	Uncertain significance (Mar 21, 2024)
11-57744480-G-A		not specified	Uncertain significance (Oct 07, 2024)
11-57744480-G-C		not specified	Uncertain significance (Mar 03, 2022)
11-57744504-C-T		not specified	Uncertain significance (Nov 30, 2022)
11-57744573-C-T		not specified	Likely benign (Jan 10, 2025)
11-57744583-C-T		not specified	Uncertain significance (Feb 06, 2025)
11-57744595-C-G		not specified	Uncertain significance (Mar 06, 2025)
11-57744616-C-T		not specified	Uncertain significance (Oct 23, 2024)
11-57744660-T-G		not specified	Uncertain significance (Oct 21, 2024)
11-57744702-G-A		not specified	Uncertain significance (Apr 25, 2023)
11-57744712-C-G		not specified	Uncertain significance (Jun 21, 2021)
11-57744715-C-T		not specified	Uncertain significance (Feb 13, 2025)
11-57744721-C-T		not specified	Likely benign (Dec 01, 2022)
11-57744735-G-A		not specified	Uncertain significance (Mar 25, 2024)
11-57744822-C-A		not specified	Uncertain significance (Sep 03, 2024)
11-57744843-G-A		not specified	Uncertain significance (Sep 13, 2023)
11-57744891-A-G		not specified	Uncertain significance (Apr 11, 2023)
11-57744922-C-G		not specified	Uncertain significance (Nov 12, 2021)
11-57744924-G-A		not specified	Uncertain significance (Jun 11, 2024)
11-57744988-T-C		not specified	Uncertain significance (Sep 26, 2023)
11-57745008-A-G		not specified	Uncertain significance (Sep 20, 2023)
11-57745035-C-A		not specified	Uncertain significance (Mar 06, 2025)

GnomAD

Source: gnomAD

Gene	Type	Bio Type	Transcript	Coding Exons	Length
BTBD18	protein_coding	protein_coding	ENST00000422652	2	8268

pLI Probability LOF Intolerant	pRec Probability LOF Recessive	Individuals with no LOFs	Individuals with Homozygous LOFs	Individuals with Heterozygous LOFs	Defined	p
0.998	0.00218	0	0	0	0	0.00

	Z-Score	Observed	Expected	Observed/Expected	Mutation Rate	Total Possible in Transcript
Missense	1.65	280	369	0.758	0.0000181	4581
Missense in Polyphen		44	81.579	0.53935		1039
Synonymous	2.15	108	140	0.769	0.00000633	1513
Loss of Function	4.18	1	22.3	0.0448	0.00000129	271

LoF frequencies by population

Ethnicity	Sum of pLOFs	p
African & African-American	0.00	0.00
Ashkenazi Jewish	0.00	0.00
East Asian	0.00	0.00
Finnish	0.00	0.00
European (Non-Finnish)	0.00	0.00
Middle Eastern	0.00	0.00
South Asian	0.00	0.00
Other	0.00	0.00

dbNSFP

Source: dbNSFP

• Function: FUNCTION: Specifically required during spermatogenesis to promote expression of piRNA precursors. The piRNA metabolic process mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and governs the methylation and subsequent repression of transposons, which is essential for the germline integrity. Acts by facilitating transcription elongation at piRNA loci during pachytene. {ECO:0000250|UniProtKB:A0A0A6YY25}.

Intolerance Scores

• rvis_EVS: 0.17
• rvis_percentile_EVS: 65.33

Essentials

• essential_gene_CRISPR: N
• essential_gene_CRISPR2: N
• gene_indispensability_pred: N
• gene_indispensability_score: 0.114

Gene Damage Prediction

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

Mouse Genome Informatics

• Gene name: Btbd18
• Phenotype: endocrine/exocrine gland phenotype; cellular phenotype; reproductive system phenotype

Gene ontology

• Biological process: male meiosis I;spermatogenesis;negative regulation of transposition;cell differentiation;positive regulation of transcription elongation from RNA polymerase II promoter;piRNA biosynthetic process
• Cellular component: nucleus