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MIRLET7B microRNA let-7b [ Homo sapiens (human) ]

Gene ID: 406884, updated on 21-May-2017
Official Symbol
MIRLET7Bprovided by HGNC
Official Full Name
microRNA let-7bprovided by HGNC
Primary source
See related
Ensembl:ENSG00000284520 MIM:611249; miRBase:MI0000063
Gene type
RNA type
RefSeq status
Homo sapiens
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
LET7B; let-7b; MIRNLET7B; hsa-let-7b
microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]
Exon count:
Annotation release Status Assembly Chr Location
108 current GRCh38.p7 (GCF_000001405.33) 22 NC_000022.11 (46113686..46113768)
105 previous assembly GRCh37.p13 (GCF_000001405.25) 22 NC_000022.10 (46509566..46509648)

Chromosome 22 - NC_000022.11Genomic Context describing neighboring genes Neighboring gene MIRLET7B host gene Neighboring gene microRNA let-7a-3 Neighboring gene microRNA 4763 Neighboring gene uncharacterized LOC105373074 Neighboring gene peroxisome proliferator activated receptor alpha Neighboring gene cysteine rich DPF motif domain containing 1

GeneRIFs: Gene References Into FunctionsWhat's a GeneRIF?

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  • MicroRNAs in cancer, organism-specific biosystem (from KEGG)
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  • MicroRNAs in cancer, conserved biosystem (from KEGG)
    MicroRNAs in cancer, conserved biosystemMicroRNA (miRNA) is a cluster of small non-encoding RNA molecules of 21 - 23 nucleotides in length, which controls gene expression post-transcriptionally either via the degradation of target mRNAs or...
Products Interactant Other Gene Complex Source Pubs Description

RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.


  1. NR_029479.1 RNA Sequence


    Source sequence(s)

RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 108 details...Open this link in a new tab

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p7 Primary Assembly


  1. NC_000022.11 Reference GRCh38.p7 Primary Assembly

    GenBank, FASTA, Sequence Viewer (Graphics)

Alternate CHM1_1.1


  1. NC_018933.2 Alternate CHM1_1.1

    GenBank, FASTA, Sequence Viewer (Graphics)
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