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LETMD1 LETM1 domain containing 1 [ Homo sapiens (human) ]

Gene ID: 25875, updated on 15-Mar-2026
Official Symbol
LETMD1provided by HGNC
Official Full Name
LETM1 domain containing 1provided by HGNC
Primary source
HGNC:HGNC:24241
See related
Ensembl:ENSG00000050426 MIM:619070; AllianceGenome:HGNC:24241
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
HCCR; HCCR1; HCCR2; HCCR-1; HCCR-2; HCRR-2; SLC55A3; 1110019O13Rik
Summary
This gene encodes a mitochondrial outer membrane protein. It has a potential role in tumorigenesis, which may result from negative regulation of the p53 tumor suppressor gene. Alternatively spliced transcript variants have been noted for this gene. [provided by RefSeq, Aug 2011]
Expression
Ubiquitous expression in thyroid (RPKM 15.5), fat (RPKM 12.3) and 25 other tissues See more
Orthologs
Try the new Gene page
Try the new Transcripts and proteins table
See LETMD1 in Genome Data Viewer
Location:
12q13.12
Exon count:
12
Annotation release Status Assembly Chr Location
RS_2025_08 current GRCh38.p14 (GCF_000001405.40) 12 NC_000012.12 (51048220..51068958)
RS_2025_08 current T2T-CHM13v2.0 (GCF_009914755.1) 12 NC_060936.1 (51011103..51031877)
RS_2024_09 previous assembly GRCh37.p13 (GCF_000001405.25) 12 NC_000012.11 (51442003..51462741)

Chromosome 12 - NC_000012.12Genomic Context describing neighboring genes Neighboring gene solute carrier family 11 member 2 Neighboring gene H3K27ac hESC enhancer GRCh37_chr12:51419127-51419740 Neighboring gene H3K27ac hESC enhancer GRCh37_chr12:51419741-51420352 Neighboring gene RNA, U6 small nuclear 87, pseudogene Neighboring gene RNA, U6 small nuclear 1273, pseudogene Neighboring gene ATAC-STARR-seq lymphoblastoid active region 6366 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 6367 Neighboring gene H3K27ac hESC enhancer GRCh37_chr12:51441816-51442354 Neighboring gene H3K27ac hESC enhancer GRCh37_chr12:51442355-51442893 Neighboring gene H3K27ac hESC enhancer GRCh37_chr12:51463214-51463714 Neighboring gene cysteine and serine rich nuclear protein 2 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4458 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr12:51477804-51478430 Neighboring gene transcription factor CP2 Neighboring gene ribosomal protein L35a pseudogene 29 Neighboring gene PHB1 pseudogene 19

  • Project title: Tissue-specific circular RNA induction during human fetal development
  • Description: 35 human fetal samples from 6 tissues (3 - 7 replicates per tissue) collected between 10 and 20 weeks gestational time were sequenced using Illumina TruSeq Stranded Total RNA
  • BioProject: PRJNA270632
  • Publication: PMID 26076956
  • Analysis date: Mon Apr 2 22:54:59 2018

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
Products Interactant Other Gene Complex Source Pubs Description

Markers

Clone Names

  • DKFZp586A011

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables molecular adaptor activity IEA
Inferred from Electronic Annotation
more info
 
enables molecular adaptor activity ISS
Inferred from Sequence or Structural Similarity
more info
PubMed 
enables protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables ribosome binding IEA
Inferred from Electronic Annotation
more info
 
Process Evidence Code Pubs
involved_in mitochondrion organization IEA
Inferred from Electronic Annotation
more info
 
involved_in mitochondrion organization ISS
Inferred from Sequence or Structural Similarity
more info
 
involved_in positive regulation of cold-induced thermogenesis IEA
Inferred from Electronic Annotation
more info
 
involved_in positive regulation of cold-induced thermogenesis ISS
Inferred from Sequence or Structural Similarity
more info
PubMed 
involved_in regulation of inflammatory response IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in regulation of phagocytosis IMP
Inferred from Mutant Phenotype
more info
PubMed 
Component Evidence Code Pubs
located_in mitochondrial inner membrane IEA
Inferred from Electronic Annotation
more info
 
located_in mitochondrial outer membrane IEA
Inferred from Electronic Annotation
more info
 
located_in mitochondrion HTP PubMed 
is_active_in mitochondrion IBA
Inferred from Biological aspect of Ancestor
more info
 
located_in mitochondrion IDA
Inferred from Direct Assay
more info
 
located_in mitochondrion IEA
Inferred from Electronic Annotation
more info
 
is_active_in nucleus IEA
Inferred from Electronic Annotation
more info
 
located_in nucleus IEA
Inferred from Electronic Annotation
more info
 
is_active_in nucleus ISS
Inferred from Sequence or Structural Similarity
more info
PubMed 
Preferred Names
LETM1 domain-containing protein 1
Names
cervical cancer 1 proto-oncogene protein p40
cervical cancer proto-oncogene 2 protein
epididymis secretory sperm binding protein
human cervical cancer oncogene
regulator of TP53

NEW Try the new Transcript table

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.

Genomic

  1. NG_029858.3 RefSeqGene

    Range
    5109..17206
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_001243689.2NP_001230618.1  LETM1 domain-containing protein 1 isoform b

    See identical proteins and their annotated locations for NP_001230618.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3) uses an alternate in-frame donor splice site at an internal exon in the 5' coding region compared to variant 1. This results in a longer isoform (b, also known as 3) containing a 13 aa protein segment not found in isoform 1.
    Source sequence(s)
    AC087884
    Consensus CDS
    CCDS58231.1
    UniProtKB/TrEMBL
    B2RCH7
    Related
    ENSP00000389903.2, ENST00000418425.6
    Conserved Domains (1) summary
    pfam07766
    Location:80351
    LETM1; LETM1-like protein
  2. NM_001300765.2NP_001287694.1  LETM1 domain-containing protein 1 isoform c

    See identical proteins and their annotated locations for NP_001287694.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (7) lacks three alternate in-frame exons in the central coding region, compared to variant 1. The encoded isoform (c, also known as 7) is shorter than isoform 1.
    Source sequence(s)
    AC087884
    Consensus CDS
    CCDS73469.1
    UniProtKB/TrEMBL
    F8W1Z2
    Related
    ENSP00000447419.1, ENST00000547008.5
    Conserved Domains (1) summary
    pfam07766
    Location:79221
    LETM1; LETM1-like protein
  3. NM_001351312.2NP_001338241.1  LETM1 domain-containing protein 1 isoform d

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2), as well as variant 12, encodes isoform d.
    Source sequence(s)
    AC087884
    Consensus CDS
    CCDS44883.1
    UniProtKB/TrEMBL
    B7Z7F8
    Related
    ENSP00000450163.1, ENST00000550929.5
    Conserved Domains (1) summary
    pfam07766
    Location:23289
    LETM1; LETM1-like protein
  4. NM_001351313.2NP_001338242.1  LETM1 domain-containing protein 1 isoform e

    Status: REVIEWED

    Description
    Transcript Variant: This variant (4), as well as variants 25-27, encodes isoform e.
    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:1188
    LETM1; LETM1-like protein
  5. NM_001351315.2NP_001338244.1  LETM1 domain-containing protein 1 isoform f

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B2RCH7
    Related
    ENSP00000620061.1, ENST00000950002.1
    Conserved Domains (1) summary
    pfam07766
    Location:86352
    LETM1; LETM1-like protein
  6. NM_001351316.2NP_001338245.1  LETM1 domain-containing protein 1 isoform g

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B2RCH7
    Conserved Domains (1) summary
    pfam07766
    Location:86312
    LETM1; LETM1-like protein
  7. NM_001351317.2NP_001338246.1  LETM1 domain-containing protein 1 isoform h

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B2RCH7
    Conserved Domains (1) summary
    pfam07766
    Location:79305
    LETM1; LETM1-like protein
  8. NM_001351319.2NP_001338248.1  LETM1 domain-containing protein 1 isoform d

    Status: REVIEWED

    Description
    Transcript Variant: This variant (12), as well as variant 2, encodes isoform d.
    Source sequence(s)
    AC087884
    Consensus CDS
    CCDS44883.1
    UniProtKB/TrEMBL
    B7Z7F8
    Conserved Domains (1) summary
    pfam07766
    Location:23289
    LETM1; LETM1-like protein
  9. NM_001351320.2NP_001338249.1  LETM1 domain-containing protein 1 isoform k

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    F8VZA2
    Conserved Domains (1) summary
    pfam07766
    Location:23249
    LETM1; LETM1-like protein
  10. NM_001351321.2NP_001338250.1  LETM1 domain-containing protein 1 isoform l

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENSP00000553046.1, ENST00000882987.1
    Conserved Domains (1) summary
    pfam07766
    Location:79255
    LETM1; LETM1-like protein
  11. NM_001351322.2NP_001338251.1  LETM1 domain-containing protein 1 isoform m

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B7Z7F8
    Conserved Domains (1) summary
    pfam07766
    Location:1251
    LETM1; LETM1-like protein
  12. NM_001351323.2NP_001338252.1  LETM1 domain-containing protein 1 isoform m

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B7Z7F8
    Conserved Domains (1) summary
    pfam07766
    Location:1251
    LETM1; LETM1-like protein
  13. NM_001351324.2NP_001338253.1  LETM1 domain-containing protein 1 isoform m

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B7Z7F8
    Conserved Domains (1) summary
    pfam07766
    Location:1251
    LETM1; LETM1-like protein
  14. NM_001351325.2NP_001338254.1  LETM1 domain-containing protein 1 isoform n

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENSP00000620057.1, ENST00000949998.1
    Conserved Domains (1) summary
    pfam07766
    Location:116244
    LETM1; LETM1-like protein
  15. NM_001351326.2NP_001338255.1  LETM1 domain-containing protein 1 isoform o

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B7Z7F8
    Related
    ENSP00000553044.1, ENST00000882985.1
    Conserved Domains (1) summary
    pfam07766
    Location:37239
    LETM1; LETM1-like protein
  16. NM_001351327.2NP_001338256.1  LETM1 domain-containing protein 1 isoform o

    Status: REVIEWED

    Source sequence(s)
    AC087884
    UniProtKB/TrEMBL
    B7Z7F8
    Conserved Domains (1) summary
    pfam07766
    Location:37239
    LETM1; LETM1-like protein
  17. NM_001351328.2NP_001338257.1  LETM1 domain-containing protein 1 isoform p

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:86228
    LETM1; LETM1-like protein
  18. NM_001351330.2NP_001338259.1  LETM1 domain-containing protein 1 isoform t

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Consensus CDS
    CCDS86301.1
    UniProtKB/TrEMBL
    F8VP71
    Related
    ENSP00000450333.1, ENST00000552739.5
    Conserved Domains (1) summary
    pfam07766
    Location:42228
    LETM1; LETM1-like protein
  19. NM_001351332.2NP_001338261.1  LETM1 domain-containing protein 1 isoform u

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:93228
    LETM1; LETM1-like protein
  20. NM_001351333.2NP_001338262.1  LETM1 domain-containing protein 1 isoform q

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:79181
    LETM1; LETM1-like protein
  21. NM_001351334.2NP_001338263.1  LETM1 domain-containing protein 1 isoform e

    Status: REVIEWED

    Description
    Transcript Variant: This variant (25), as well as variants 4, 26, and 27, encodes isoform e (also called isoform r).
    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:1188
    LETM1; LETM1-like protein
  22. NM_001351335.2NP_001338264.1  LETM1 domain-containing protein 1 isoform e

    Status: REVIEWED

    Description
    Transcript Variant: This variant (26), as well as variants 4, 25, and 27, encodes isoform e (also called isoform r).
    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:1188
    LETM1; LETM1-like protein
  23. NM_001351336.2NP_001338265.1  LETM1 domain-containing protein 1 isoform e

    Status: REVIEWED

    Description
    Transcript Variant: This variant (27), as well as variants 4, 25, and 26, encodes isoform e (also called isoform r).
    Source sequence(s)
    AC087884
    Conserved Domains (1) summary
    pfam07766
    Location:1188
    LETM1; LETM1-like protein
  24. NM_001351337.2NP_001338266.1  LETM1 domain-containing protein 1 isoform s

    Status: REVIEWED

    Source sequence(s)
    AC087884, KF455649
    Conserved Domains (1) summary
    pfam07766
    Location:79181
    LETM1; LETM1-like protein
  25. NM_015416.5NP_056231.3  LETM1 domain-containing protein 1 isoform a

    See identical proteins and their annotated locations for NP_056231.3

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) represents the predominant protein-coding transcript, and encodes isoform a (also known as HCCR-1 or 1).
    Source sequence(s)
    AC087884
    Consensus CDS
    CCDS8806.1
    UniProtKB/Swiss-Prot
    A6NER7, B3KXK7, Q6P1Q0, Q6X2E4, Q6X2E5, Q7L2G9, Q7L690, Q8WXW6, Q96PK7, Q9BY59, Q9Y3X3
    UniProtKB/TrEMBL
    A0A384P5D7, B2RCH7
    Related
    ENSP00000262055.4, ENST00000262055.9
    Conserved Domains (1) summary
    pfam07766
    Location:79345
    LETM1; LETM1-like protein

RNA

  1. NR_045019.2 RNA Sequence

    Status: REVIEWED

    Description
    Transcript Variant: This variant (5) lacks two consecutive exons compared to variant 1. It is represented as non-coding due to the presence of an upstream ORF that is predicted to interfere with the translation of the longest ORF; translation of the upstream ORF renders this transcript a candidate for nonsense-mediated mRNA decay (NMD).
    Source sequence(s)
    AC087884
    Related
    ENST00000547318.5
  2. NR_045020.3 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884, KF455649
  3. NR_147098.1 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884, BU688852
  4. NR_147099.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  5. NR_147100.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  6. NR_147101.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  7. NR_147102.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENST00000926718.1
  8. NR_147103.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  9. NR_147104.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  10. NR_147105.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  11. NR_147106.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  12. NR_147107.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  13. NR_147108.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  14. NR_147109.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  15. NR_147110.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  16. NR_147111.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENST00000926722.1
  17. NR_147112.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENST00000550100.5
  18. NR_147113.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENST00000547555.5
  19. NR_147114.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  20. NR_147115.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENST00000380135.7
  21. NR_147116.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
    Related
    ENST00000949997.1
  22. NR_147117.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  23. NR_147118.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  24. NR_147119.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884
  25. NR_147120.2 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC087884

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2025_08

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

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000012.12 Reference GRCh38.p14 Primary Assembly

    Range
    51048220..51068958
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_047428688.1XP_047284644.1  LETM1 domain-containing protein 1 isoform X2

    UniProtKB/TrEMBL
    B2RCH7
  2. XM_047428687.1XP_047284643.1  LETM1 domain-containing protein 1 isoform X1

    UniProtKB/TrEMBL
    B2RCH7

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060936.1 Alternate T2T-CHM13v2.0

    Range
    51011103..51031877
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_054371706.1XP_054227681.1  LETM1 domain-containing protein 1 isoform X2

    UniProtKB/TrEMBL
    B2RCH7
  2. XM_054371705.1XP_054227680.1  LETM1 domain-containing protein 1 isoform X1

    UniProtKB/TrEMBL
    B2RCH7

Suppressed Reference Sequence(s)

The following Reference Sequences have been suppressed. Explain

  1. NM_001024668.1: Suppressed sequence

    Description
    NM_001024668.1: This RefSeq was permanently suppressed because it is a nonsense-mediated mRNA decay (NMD) candidate.
  2. NM_001024669.1: Suppressed sequence

    Description
    NM_001024669.1: This RefSeq was permanently suppressed because it is a nonsense-mediated mRNA decay (NMD) candidate.
  3. NM_001024670.1: Suppressed sequence

    Description
    NM_001024670.1: This RefSeq was permanently suppressed because it is a nonsense-mediated mRNA decay (NMD) candidate.
  4. NM_001024671.1: Suppressed sequence

    Description
    NM_001024671.1: This RefSeq was permanently suppressed because it is a nonsense-mediated mRNA decay (NMD) candidate.