Tag Content
UniProt Accession
Theoretical PI
Molecular Weight
60630 Da  
Genbank Nucleotide ID
Genbank Protein ID
Gene Name
Gene Synonyms/Alias
Gk-rs2, Gkrs2 
Protein Name
Glycerol kinase 2 
Protein Synonyms/Alias
GK 2Glycerokinase 2EC= ATP; Glycerol kinase, testis specific 2; 
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. Glycerol kinase catalyzes the metabolism of endogenously derived and dietary glycerol. GyK is a member of a small group of kinases termed ambiquitous enzymes, which are found either in the cytosol or as membrane-bound complexes associated with the voltage-dependent anion channel of the mitochondrial outer membrane. In Homo sapiens, the GyK gene family consists of an X-encoded locus and several X-linked and autosomal intronless retroposons, which, apparently, comprise both functional genes and processed pseudogenes. To study the role of the autosomal genes in mammalian physiology, we have isolated two murine GyK-like genes, determined their structures and chromosomal locations, and examined their functions. These sequences are intronless retroposons, which appear to be paralogues of the X-encoded, brain-specific GyK isoform and are expressed only in the testes. Though both retrotransposition events appear to have occurred prior to the primate-rodent divergence of some 65-80 million years ago, only one of the retrotransposed murine gene sequences, based upon its chromosomal location, is conserved with modern H. sapiens. To test the hypothesis that the murine GyK-like genes encode functional GyK activity, transient transfection of the gene sequences into COS7 cells was carried out. While in vitro translation confirmed that the transcripts could direct the synthesis of proteins of the appropriate size, no GyK activity was detected. Such data suggest that the autosomal GyK-like genes have evolved novel, testis-specific functions. A comparison of the human and mouse GyK-like gene sequences demonstrates the evolutionary relationships between each autosomal isoform and its corresponding X-linked ancestral locus. PMID: [10444329] 

2. 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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Key enzyme in the regulation of glycerol uptake andmetabolism. 
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Subcellular Location
Mitochondrion outer membrane; Peripheralmembrane protein; Cytoplasmic side (By similarity). Cytoplasm (Bysimilarity). Note=In sperm the majority of the enzyme is bound tomitochondria (By similarity). 
Tissue Specificity
Gene Ontology
GO IDGO termEvidence
GO:0005741 C:mitochondrial outer membrane IEA:UniProtKB-SubCell.
GO:0005739 C:mitochondrion IDA:MGI.
GO:0005524 F:ATP binding IEA:UniProtKB-KW.
GO:0004370 F:glycerol kinase activity IEA:EC.
GO:0019563 P:glycerol catabolic process IEA:UniProtKB-UniPathway.
GO:0006072 P:glycerol-3-phosphate metabolic process IEA:InterPro.
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IPR018485;    Carb_kinase_FGGY_C.
IPR018483;    Carb_kinase_FGGY_CS.
IPR018484;    Carb_kinase_FGGY_N.
IPR005999;    Glycerol_kin.
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PF02782;    FGGY_C;    1.
PF00370;    FGGY_N;    1.
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PS00933;    FGGY_KINASES_1;    1.
PS00445;    FGGY_KINASES_2;    1.
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Created Date
Record Type
GAS predicted 
Sequence Annotation
CHAIN         1    554       Glycerol kinase 2.
NP_BIND     427    431       ATP (By similarity).
BINDING      20     20       Substrate (By similarity).
BINDING      24     24       ATP (By similarity).
BINDING      94     94       Substrate (By similarity).
BINDING     148    148       Substrate (By similarity).
BINDING     259    259       Substrate (By similarity).
BINDING     281    281       ATP (By similarity).
BINDING     326    326       ATP; via carbonyl oxygen (By similarity).
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Nucleotide Sequence
Length: 1848 bp   Go to nucleotide: FASTA
Protein Sequence
Length: 554 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