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Identification
HMDB Protein ID HMDBP06250
Secondary Accession Numbers
  • 11852
Name Exostosin-like 2
Synonyms
  1. Alpha-1,4-N-acetylhexosaminyltransferase EXTL2
  2. Alpha-GalNAcT EXTL2
  3. EXT-related protein 2
  4. Glucuronyl-galactosyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase
  5. Processed exostosin-like 2
Gene Name EXTL2
Protein Type Enzyme
Biological Properties
General Function Involved in transferase activity, transferring hexosyl groups
Specific Function Glycosyltransferase required for the biosynthesis of heparan-sulfate and responsible for the alternating addition of beta-1-4-linked glucuronic acid (GlcA) and alpha-1-4-linked N-acetylglucosamine (GlcNAc) units to nascent heparan sulfate chains.
Pathways
  • Glycosaminoglycan biosynthesis - heparan sulfate / heparin
  • heparan sulfate biosynthesis
Reactions
Uridine diphosphate-N-acetylglucosamine + beta-D-glucuronosyl-(1->3)-beta-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-xylosyl-proteoglycan → Uridine 5'-diphosphate + alpha-N-acetyl-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-(1->3)-beta-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-xylosyl-proteoglycan details
UDP-N-acetyl-D-glucosamine + → UDP + details
GO Classification
Biological Process
heparan sulfate proteoglycan biosynthetic process
UDP-N-acetylgalactosamine metabolic process
N-acetylglucosamine metabolic process
Cellular Component
endoplasmic reticulum
intrinsic to endoplasmic reticulum membrane
extracellular region
integral to membrane
Component
cell part
membrane part
intrinsic to membrane
intrinsic to organelle membrane
intrinsic to endoplasmic reticulum membrane
Function
catalytic activity
transferase activity
transferase activity, transferring hexosyl groups
transferase activity, transferring glycosyl groups
Molecular Function
metal ion binding
alpha-1,4-N-acetylgalactosaminyltransferase activity
glucuronyl-galactosyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase activity
Cellular Location
  1. Processed exostosin-like 2:Secreted
Gene Properties
Chromosome Location 1
Locus 1p21
SNPs EXTL2
Gene Sequence
>993 bp
ATGAGGTGTTGCCACATCTGCAAACTTCCTGGGAGAGTAATGGGGATTCGAGTGCTTCGA
TTATCTTTGGTGGTCATCCTCGTATTATTACTGGTAGCTGGTGCTTTGACTGCCTTACTT
CCCAGTGTTAAAGAAGACAAGATGCTCATGTTGCGTAGGGAAATAAAATCCCAGGGCAAG
TCCACCATGGACTCCTTTACTCTCATAATGCAGACGTACAACAGAACAGATCTCTTATTG
AAACTTTTAAATCATTATCAGGCTGTACCAAATCTGCACAAAGTGATTGTGGTATGGAAC
AATATTGGAGAGAAGGCACCAGATGAATTATGGAATTCTCTAGGGCCCCACCCTATCCCT
GTGATCTTCAAACAACAGACAGCAAACAGGATGAGAAATCGACTCCAGGTCTTTCCTGAA
CTGGAAACCAATGCAGTGTTGATGGTAGATGATGACACACTCATCAGCACCCCAGACCTT
GTTTTTGCTTTCTCAGTTTGGCAGCAATTTCCTGATCAAATTGTAGGATTTGTTCCTAGA
AAGCACGTCTCTACTTCATCAGGTATCTACAGTTATGGAAGTTTTGAAATGCAAGCACCA
GGGTCTGGAAATGGTGACCAGTACTCTATGGTGCTGATTGGAGCCTCATTCTTCAATAGC
AAATATCTTGAATTATTTCAGAGGCAACCTGCAGCTGTCCATGCTTTGATAGATGATACT
CAAAACTGTGATGATATTGCCATGAATTTTATCATTGCCAAGCATATTGGCAAGACTTCA
GGGATATTTGTGAAGCCTGTAAACATGGACAATTTGGAAAAAGAAACCAACAGTGGCTAT
TCTGGAATGTGGCATCGAGCTGAGCACGCTCTGCAGAGGTCTTATTGTATAAATAAGCTT
GTTAATATCTATGATAGCATGCCCTTAAGATACTCCAACATTATGATTTCCCAGTTTGGT
TTTCCATATGCCAACTACAAAAGAAAAATATAA
Protein Properties
Number of Residues 330
Molecular Weight 37465.365
Theoretical pI 8.947
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>Exostosin-like 2
MRCCHICKLPGRVMGIRVLRLSLVVILVLLLVAGALTALLPSVKEDKMLMLRREIKSQGK
STMDSFTLIMQTYNRTDLLLKLLNHYQAVPNLHKVIVVWNNIGEKAPDELWNSLGPHPIP
VIFKQQTANRMRNRLQVFPELETNAVLMVDDDTLISTPDLVFAFSVWQQFPDQIVGFVPR
KHVSTSSGIYSYGSFEMQAPGSGNGDQYSMVLIGASFFNSKYLELFQRQPAAVHALIDDT
QNCDDIAMNFIIAKHIGKTSGIFVKPVNMDNLEKETNSGYSGMWHRAEHALQRSYCINKL
VNIYDSMPLRYSNIMISQFGFPYANYKRKI
GenBank ID Protein 2895062
UniProtKB/Swiss-Prot ID Q9UBQ6
UniProtKB/Swiss-Prot Entry Name EXTL2_HUMAN
PDB IDs Not Available
GenBank Gene ID AF000416
GeneCard ID EXTL2
GenAtlas ID EXTL2
HGNC ID HGNC:3516
References
General References
  1. Ota T, Suzuki Y, Nishikawa T, Otsuki T, Sugiyama T, Irie R, Wakamatsu A, Hayashi K, Sato H, Nagai K, Kimura K, Makita H, Sekine M, Obayashi M, Nishi T, Shibahara T, Tanaka T, Ishii S, Yamamoto J, Saito K, Kawai Y, Isono Y, Nakamura Y, Nagahari K, Murakami K, Yasuda T, Iwayanagi T, Wagatsuma M, Shiratori A, Sudo H, Hosoiri T, Kaku Y, Kodaira H, Kondo H, Sugawara M, Takahashi M, Kanda K, Yokoi T, Furuya T, Kikkawa E, Omura Y, Abe K, Kamihara K, Katsuta N, Sato K, Tanikawa M, Yamazaki M, Ninomiya K, Ishibashi T, Yamashita H, Murakawa K, Fujimori K, Tanai H, Kimata M, Watanabe M, Hiraoka S, Chiba Y, Ishida S, Ono Y, Takiguchi S, Watanabe S, Yosida M, Hotuta T, Kusano J, Kanehori K, Takahashi-Fujii A, Hara H, Tanase TO, Nomura Y, Togiya S, Komai F, Hara R, Takeuchi K, Arita M, Imose N, Musashino K, Yuuki H, Oshima A, Sasaki N, Aotsuka S, Yoshikawa Y, Matsunawa H, Ichihara T, Shiohata N, Sano S, Moriya S, Momiyama H, Satoh N, Takami S, Terashima Y, Suzuki O, Nakagawa S, Senoh A, Mizoguchi H, Goto Y, Shimizu F, Wakebe H, Hishigaki H, Watanabe T, Sugiyama A, Takemoto M, Kawakami B, Yamazaki M, Watanabe K, Kumagai A, Itakura S, Fukuzumi Y, Fujimori Y, Komiyama M, Tashiro H, Tanigami A, Fujiwara T, Ono T, Yamada K, Fujii Y, Ozaki K, Hirao M, Ohmori Y, Kawabata A, Hikiji T, Kobatake N, Inagaki H, Ikema Y, Okamoto S, Okitani R, Kawakami T, Noguchi S, Itoh T, Shigeta K, Senba T, Matsumura K, Nakajima Y, Mizuno T, Morinaga M, Sasaki M, Togashi T, Oyama M, Hata H, Watanabe M, Komatsu T, Mizushima-Sugano J, Satoh T, Shirai Y, Takahashi Y, Nakagawa K, Okumura K, Nagase T, Nomura N, Kikuchi H, Masuho Y, Yamashita R, Nakai K, Yada T, Nakamura Y, Ohara O, Isogai T, Sugano S: Complete sequencing and characterization of 21,243 full-length human cDNAs. Nat Genet. 2004 Jan;36(1):40-5. Epub 2003 Dec 21. [PubMed:14702039 ]
  2. Saito T, Seki N, Yamauchi M, Tsuji S, Hayashi A, Kozuma S, Hori T: Structure, chromosomal location, and expression profile of EXTR1 and EXTR2, new members of the multiple exostoses gene family. Biochem Biophys Res Commun. 1998 Feb 4;243(1):61-6. [PubMed:9473480 ]
  3. McCormick C, Duncan G, Goutsos KT, Tufaro F: The putative tumor suppressors EXT1 and EXT2 form a stable complex that accumulates in the Golgi apparatus and catalyzes the synthesis of heparan sulfate. Proc Natl Acad Sci U S A. 2000 Jan 18;97(2):668-73. [PubMed:10639137 ]
  4. Wuyts W, Van Hul W, Hendrickx J, Speleman F, Wauters J, De Boulle K, Van Roy N, Van Agtmael T, Bossuyt P, Willems PJ: Identification and characterization of a novel member of the EXT gene family, EXTL2. Eur J Hum Genet. 1997 Nov-Dec;5(6):382-9. [PubMed:9450183 ]
  5. Kitagawa H, Shimakawa H, Sugahara K: The tumor suppressor EXT-like gene EXTL2 encodes an alpha1, 4-N-acetylhexosaminyltransferase that transfers N-acetylgalactosamine and N-acetylglucosamine to the common glycosaminoglycan-protein linkage region. The key enzyme for the chain initiation of heparan sulfate. J Biol Chem. 1999 May 14;274(20):13933-7. [PubMed:10318803 ]