Tag Content
UniProt Accession
Theoretical PI
Molecular Weight
9865 Da  
Genbank Nucleotide ID
Genbank Protein ID
Gene Name
Gene Synonyms/Alias
Protein Name
Diazepam-binding inhibitor-like 5 
Protein Synonyms/Alias
Endozepine-like peptide;ELP 
Mus musculus (Mouse) 
NCBI Taxonomy ID
Chromosome Location
View in Ensembl genome browser  
Function in Stage
Function in Cell Type
Probability (GAS) of Function in Spermatogenesis
The probability was calculated by GAS algorithm, ranging from 0 to 1. The closer it is to 1, the more possibly it functions in spermatogenesis.
Temporarily unavailable 
Abstract of related literatures
1. A cDNA clone encoding a novel endozepine-like peptide (ELP) was isolated from mouse testes, sequenced, and its mRNA expression characterized by northern and in situ hybridization. ELP mRNA was found exclusively in the late spermatid stages of spermatogenesis in the testes of sexually mature mice and in no other tissue or cell type examined. It was also expressed in rat, bovine, porcine and sheep testes. Mouse ELP-encoding cDNA was used to construct expression vectors for the production of ELP in bacteria, and the purified bacterial protein used to raise polyclonal antibodies in rats. These antibodies identified the predicted endogenous ELP in extracts of mouse testis and epididymis and in no other tissue. Immunohistochemistry confirmed that the ELP antigen was present only in late spermatids and spermatozoa, particularly within the cytoplasmic droplet which is retained by the mature spermatozoa during their transit into the epididymis. We conclude that ELP is an intracytoplasmic peptide exclusively expressed in post-meiotic spermatozoa and which may be involved in the energy metabolism of the mature sperm. PMID: [8898349] 

2. The endozepine-like peptide (ELP) represents a testis-specific isoform of the ubiquitous acyl-CoA binding protein (ACBP) and is highly expressed in late haploid stages of male germ cell development. The genomic sequence of the functional ELP gene as well as that of a pseudogene were analysed from independent bacteriophage clones of a 129sv mouse genomic library. Unlike the ACBP gene, which comprises four exons, the ELP gene has only a single intron within the region of the 5' untranslated region, suggesting that, like some other haploid expressed genes, the ELP gene might have evolved by retroposon-mediated gene duplication. Primer extension analysis was used to define the start site for transcription and hence the 5' promoter region. Electrophoretic mobility shift analysis was carried out on this region comparing nuclear extracts from adult mouse testis with those from mouse liver. Several testis-specific DNA-protein complexes were observed throughout 700 bp upstream of the transcription start site. One of these could be identified as corresponding to a steroidogenic factor-1 (SF-1) binding element. Further analysis using pure transcription factors showed that this element at position -340 was able to bind specifically to both SF-1 and to the germ cell nuclear factor (GCNF). Immunohistochemical analysis using an ELP-specific antibody showed that expression was very restricted within the testis to the postmeiotic germ cells, and in the ovary to interstitial/luteal cells, cell-types known to express GCNF and SF-1, respectively. Testes of CREM-tau knockout mice, lacking all spermatogenic stages later than round spermatids, were devoid of ELP immunoreactivity, whereas in RAD6 knockout mice the few remaining elongated spermatids were clearly defined by this excellent late haploid marker product. The ELP gene and its product thus offer an ideal system with which to investigate the differentiation of late haploid stages of spermatogenesis. PMID: [10951202] 

3. The National Institutes of Health's Mammalian Gene Collection (MGC) project was designed to generate and sequence a publicly accessible cDNA resource containing a complete open reading frame (ORF) for every human and mouse gene. The project initially used a random strategy to select clones from a large number of cDNA libraries from diverse tissues. Candidate clones were chosen based on 5'-EST sequences, and then fully sequenced to high accuracy and analyzed by algorithms developed for this project. Currently, more than 11,000 human and 10,000 mouse genes are represented in MGC by at least one clone with a full ORF. The random selection approach is now reaching a saturation point, and a transition to protocols targeted at the missing transcripts is now required to complete the mouse and human collections. Comparison of the sequence of the MGC clones to reference genome sequences reveals that most cDNA clones are of very high sequence quality, although it is likely that some cDNAs may carry missense variants as a consequence of experimental artifact, such as PCR, cloning, or reverse transcriptase errors. Recently, a rat cDNA component was added to the project, and ongoing frog (Xenopus) and zebrafish (Danio) cDNA projects were expanded to take advantage of the high-throughput MGC pipeline. PMID: [15489334] 

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May be involved in the energy metabolism of the maturesperm. 
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Subcellular Location
Tissue Specificity
Exclusively expressed in late spermatids andspermatozoa. Not found in epididymis, spleen, bone marrow, skin,liver, brain, heart, kidney, muscle. 
Gene Ontology
GO IDGO termEvidence
GO:0005737 C:cytoplasm IEA:UniProtKB-SubCell.
GO:0000062 F:fatty-acyl-CoA binding IEA:InterPro.
GO:0008289 F:lipid binding IEA:UniProtKB-KW.
GO:0007283 P:spermatogenesis IEA:Compara.
GO:0006810 P:transport IEA:UniProtKB-KW.
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IPR022408;    Acyl-CoA-binding_prot_CS.
IPR000582;    Acyl-CoA-binding_protein.
IPR014352;    FERM/acyl-CoA-bd_prot_3-hlx.
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PF00887;    ACBP;    1.
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PS00880;    ACB_1;    1.
PS51228;    ACB_2;    1.
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PR00689;    ACOABINDINGP.;   
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Created Date
Record Type
GAS predicted 
Sequence Annotation
CHAIN         1     87       Diazepam-binding inhibitor-like 5.
DOMAIN        2     87       ACB.
REGION       29     33       Acyl-CoA binding (By similarity).
BINDING      55     55       Acyl-CoA (By similarity).
BINDING      74     74       Acyl-CoA (By similarity).
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Nucleotide Sequence
Length: 563 bp   Go to nucleotide: FASTA
Protein Sequence
Length: 87 bp   Go to amino acid: FASTA
The verified Protein-Protein interaction information
Gene Symbol Ref Databases
Other Protein-Protein interaction resources
String database  
View Microarray data