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External IDsGeneCards: [1]
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC)n/an/a
PubMed searchn/an/a
View/Edit Human

Glutamine-rich protein 2 is a protein that in humans is edcoded by the QRICH2 gene on human chromosome 17.[1][2] The function of QRICH2 protein is mostly unknown, but it has been shown that QRICH2 gene contains a high molecular weight Glutenin domain and an ATPase involved domain.[2] QRICH2 gene is highly expressed in testis,[3] and the subcellular location of QRICH2 protein is in the nucleus.[4]

NCBI Reference Number Length location Molecular weight PI
mRNA: NM_032134.1

Protein: NP_115510.1

mRNA: 5411 bp

Protein: 1663 aa

17q25.1 180.8 kdal 6.25


QRICH2 mRNA is 5411 bp long, and its chromosomal location in human is 17q25.1. QRICH2 mRNA has 19 exons and it contains two main function domains: a high molecular weight Glutenin domain (amino acid 446-979) and an ATPase involved domain (amino acid 1036-1413). QRICH2 locates between UBAL D2 gene and PRPSAP1 gene on chromosome 17.[5] There is no predicted stem loop structure on QRICH2 mRNA because there isn't any complementary RNA sequences.[6]


QRICH2 protein is 1663 amino acids long, and 10.9% of the amino acids are Glutamine (Q). 38% of the QRICH2 protein secondary structure is alpha-helix, 39% is beta-sheet and 13% is turning.[7][8] The human tissue type with the highest level of QRICH2 expression is testis, and this result is confirmed by the Gene Expression Profile for mouse and dog too.[9] The subcellular location of QRICH2 protein is in the nucleus. QRICH2 is a soluble protein, its average hydrophobicity is -0.5995.[10] QRICH2 protein interact with a number of other proteins including SSSCA1, TSSC1, GAPDH, NUP98 and SNAI1.[1]



Species Gene name Accession(mRNA) Length(bp) E-value Identity Coverage Location
Human FLJ25373 AK058102 1499 0.0 99% 27% ch7

FLJ25737 mRNA sequences[12] perfectly match with two regions on the QRICH2 mRNA (bp 3157-4302 on QRICH2 match with bp 1-1146 on FLJ25737, bp 4998-5307 on QRICH2 match with bp 1140-1499 on FLJ25737). However, FLJ25737 locates on chromosome 7 and QRICH2 locates on chromosome 17.

Species Protein name Accession(Protein) Length(aa) E-value Identity Coverage Location
Human Spermine like protein 1 NP_001012998.2 632 6.00e-46 34% 39% Xq21.1
Human Protein piccolo isoform 1 NP_149015.2 5142 3.00e-10 30% 33% 7q11.23


Species Common name Divergence

(Million years ago)

Accession(Protein) Length(aa) Identity Coverage
Rattus norvegicus Brown rat 92.3 XP_577148.4 1971 51% 99%
Nomascus leucogenys Gibbon 20.4 XP_003279182.2 1768 80% 99%
Canis lupus familiaris Dog 94.2 XP_533125.3 1936 67% 99%
Loxodonta africana Elephant 98.7 XP_003417424.1 1973 65% 99%
Ailuropoda melanoleuca Panda 94.2 XP_002919929.1 1903 64% 99%
Otolemur garnettii Bushbaby 74 XP_003785524.1 1963 63% 99%
Sus scrofa Boar 94.2 XP_003131230.1 1983 63% 99%
Cavia porcellus Guinea pig 92.3 XP_003461498 1852 61% 99%
Felis catus Cat 94.2 XP_003997276.1 1755 61% 98%
Papio anubis Babbon 29 XP_003913523.1 2043 80% 97%
Gorilla gorilla Gorilla 8.8 XP_004041087 507 99% 30%
Mus musculus House mouse 92.3 NP_001028439.1 592 77% 30%

QRICH2 protein has well conserved orthologs in many species. The orthologous protein sequences match very well at the region where the high molecular weight Glutenin domain and ATPase involved domain is.


The function of QRICH2 protein is mostly unknown. QRICH2 has been shown to belong to the common expression groups on human chromosome 17. The following genes belonged to the common expression groups on chromosome 17:[13] NCOR1, GFAP, QRICH2, ANAPC11 and PER1. QRICH2 may also be an up-regulated gene involved in cell adhesion and cellular morphogenesis.[14] The high expression of QRICH2 gene in testis may suggest that QRICH2 protein has some functions related to hormone production in males. QRICH2 protein has some sequence similarities with the spermidine/spermine N(1)-acetyl-like protein 1 in several species.[11]


  1. 1.0 1.1 "Genecards: QRICH2". Genecards, The Human Gene Compendium.
  2. 2.0 2.1 "NCBI Nucleotide: QRICH2". National Center for Biotechnology Information, Nucleotide Database.
  3. "NCBI Gene Expression Omnibus (GEO): QRICH2 expression in various tissues in human".
  4. "PSORT II Prediction".
  5. "NCBI Gene: QRICH2". National Center for Biotechnology Information, Gene Database
  6. "Nucleic acid dot plot".
  7. "CHOFAS tool". San Diego Supercomputer Center.
  8. Chou PY, Fasman GD (1978). "Prediction of the secondary structure of proteins from their amino acid sequence". Adv. Enzymol. Relat. Areas Mol. Biol. 47: 45–148. doi:10.1002/9780470122921.ch2. PMID 364941.
  9. "Expression data (EST profile) for QRICH2". Unigene NCBI.
  10. "SOSUI, Classification and Secondary Structure Prediction". Expasy Bioinformatics Resource Portal.
  11. 11.0 11.1 "NCBI BLAST". Basic Local Alignment Search Tool.
  12. "NCBI FLJ25737". NCBI Nucleotide Database.
  13. Zaravinos A, Lambrou GI, Boulalas I, Delakas D, Spandidos DA (2011). "Identification of common differentially expressed genes in urinary bladder cancer". PLoS ONE. 6 (4): e18135. doi:10.1371/journal.pone.0018135. PMC 3070717. PMID 21483740.
  14. Król M, Pawłowski KM, Szyszko K, Maciejewski H, Dolka I, Manuali E, Jank M, Motyl T (2012). "The gene expression profiles of canine mammary cancer cells grown with carcinoma-associated fibroblasts (CAFs) as a co-culture in vitro". BMC Vet. Res. 8: 35. doi:10.1186/1746-6148-8-35. PMC 3355042. PMID 22453032.