LIN28B
protein-codinglin-28 homolog B
Gene summary
The protein encoded by this gene belongs to the lin-28 family, which is characterized by the presence of a cold-shock domain and a pair of CCHC zinc finger domains. This gene is highly expressed in testis, fetal liver, placenta, and in primary human tumors and cancer cell lines. It is negatively regulated by microRNAs that target sites in the 3' UTR, and overexpression of this gene in primary tumors is linked to the repression of let-7 family of microRNAs and derepression of let-7 targets, which facilitates cellular transformation. [provided by RefSeq, Jun 2012]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~146.7 kbGenCC 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 LIN28B variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_001004317.4. 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 | 2 | 2 | ||||
| missense | 26 | 2 | 28 | |||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 26 | 4 | 0 | 30 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_001004317.1 | 4 | MANE Select | |
| Ensembl | ENSP00000344401.4 | 4 | MANE Select | |
| RefSeq | NP_001397868.1 | 4 | Standard | |
| Ensembl | ENSP00000489735.1 | 5 | Standard |
Model Organisms & Knockout Phenotypes
Observed phenotypic effects in mouse and zebrafish models
| Gene / Model | Organism | Observed Phenotype |
|---|---|---|
| lin28b | Danio rerio | Structure: post-vent region Quality: decreased length abnormal |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- Cardiac Progenitor Differentiation
- Validated targets of C-MYC transcriptional activation
Biological Process
- regulation of transcription, DNA-templated
- miRNA catabolic process
- pre-miRNA processing
- RNA 3'-end processing
Molecular Function
- DNA binding
- RNA binding
- protein binding
- zinc ion binding
Cellular Component
- nucleus
- nucleolus
- cytosol
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000345080
- Coding exons
- 4
- Length
- 126285
- Individuals with no LoFs
- 125743
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 3
- Defined
- 125746
- p
- 0.0000119
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 1.28 | 96 | 138 | 0.694 | 0.00000673 | 1614 |
| Missense (PolyPhen) | 10 | 34.397 | 0.29073 | 456 | ||
| Synonymous | -0.361 | 54 | 50.7 | 1.06 | 0.00000255 | 490 |
| Loss of Function | 2.51 | 2 | 11.0 | 0.182 | 5.31e-7 | 142 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0 | 0.0 | absent |
| Latino/Admixed American | 0 | 0.0 | absent |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0.000054 | 0.000054 | rare |
| Finnish | 0 | 0.0 | absent |
| European (Non-Finnish) | 0.0000088 | 0.0000088 | rare |
| South Asian | 0.000033 | 0.000033 | rare |
| Other | 0 | 0.0 | absent |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Suppressor of microRNA (miRNA) biogenesis, including that of let-7 and possibly of miR107, miR-143 and miR-200c. Binds primary let-7 transcripts (pri-let-7), including pri-let-7g and pri-let-7a-1, and sequester them in the nucleolus, away from the microprocessor complex, hence preventing their processing into mature miRNA (PubMed:22118463). Does not act on pri-miR21 (PubMed:22118463). The repression of let-7 expression is required for normal development and contributes to maintain the pluripotent state of embryonic stem cells by preventing let-7-mediated differentiation. When overexpressed, recruits ZCCHC11/TUT4 uridylyltransferase to pre-let-7 transcripts, leading to their terminal uridylation and degradation (PubMed:19703396). This activity might not be relevant in vivo, as LIN28B-mediated inhibition of let-7 miRNA maturation appears to be ZCCHC11- independent (PubMed:22118463). Interaction with target pre-miRNAs occurs via an 5'-GGAG-3' motif in the pre-miRNA terminal loop. Mediates MYC-induced let-7 repression (By similarity). When overexpressed, isoform 1 stimulates growth of the breast adenocarcinoma cell line MCF-7. Isoform 2 has no effect on cell growth. {ECO:0000250|UniProtKB:Q45KJ6, ECO:0000269|PubMed:16971064, ECO:0000269|PubMed:18951094, ECO:0000269|PubMed:19703396, ECO:0000269|PubMed:22118463}.;
Recessive Scores
- pRec
- 0.0712
Intolerance Scores
- LoFtool
- 0.0679
- RVIS EVS
- 0.04
- RVIS percentile EVS
- 56.64
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- N
- Essential (gene trap)
- H
- Indispensability pred.
- E
- Indispensability score
- 0.614
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |