Lysyl hydroxylase

procollagen-lysine 1, 2-oxoglutarate 5-dioxygenase 1
Identifiers
Symbol	PLOD1
Alt. symbols	LLH, PLOD
Entrez	5351
HUGO	9081
OMIM	153454
RefSeq	NM_000302
UniProt	Q02809
Other data
EC number	1.14.11.4
Locus	Chr. 1 p36.3-36.2

procollagen-lysine, 2-oxoglutarate 5-dioxygenase 2
Identifiers
Symbol	PLOD2
Entrez	5352
HUGO	9082
OMIM	601865
RefSeq	NM_000935
UniProt	O00469
Other data
Locus	Chr. 3 q24

Lysyl hydroxylases (or procollagen-lysine 5-dioxygenases) are oxygenase enzymes that catalyze the hydroxylation of lysine to hydroxylysine.^[1]^[2] Lysyl hydroxylases require iron and vitamin C as cofactors for their oxidation activity. It takes place (as a post-translational modification) following collagen synthesis in the cisternae (lumen) of the rough endoplasmic reticulum (ER). There are three lysyl hydroxylases (LH1-3) encoded in the human genome, namely: PLOD1, PLOD2 and PLOD3. From PLOD2 two splice variant can be expressed (LH2a and LH2b), where LH2b differs from LH2a by incorporating the small exon 13A. LH1 and LH3 hydroxylate lysyl residues in the collagen triple helix, whereas LH2b hydroxylates lysyl residues in the telopeptides of collagen. In addition to its hydroxylation activity, LH3 has glycosylation activity that produces either monosaccharide (Gal) or disaccharide (Glc-Gal) attached to collagen hydroxylysines.

Collagen lysyl hydroxylation is the first step in collagen pyridinoline cross-linking, that is necessary for the stabilization of collagen.

Pathology

Mutations in the PLOD2 gene have been linked to Bruck syndrome in humans.

A deficiency in its cofactor, Vitamin C, is associated with Scurvy.

References

↑ Hausmann E (Apr 1967). "Cofactor requirements for the enzymatic hydroxylation of lysine in a polypeptide precursor of collagen". Biochimica et Biophysica Acta. 133 (3): 591–3. doi:10.1016/0005-2795(67)90566-1. PMID 6033801.
↑ Rhoads RE, Udenfriend S (Aug 1968). "Decarboxylation of alpha-ketoglutarate coupled to collagen proline hydroxylase". Proceedings of the National Academy of Sciences of the United States of America. 60 (4): 1473–8. doi:10.1073/pnas.60.4.1473. PMC 224943. PMID 5244754.

External links

Lysyl Hydroxylase at the US National Library of Medicine Medical Subject Headings (MeSH)

Metabolism: Protein metabolism, synthesis and catabolism enzymes

Essential amino acids are in Capitals

K→acetyl-CoA

LYSINE→	Saccharopine dehydrogenase Glutaryl-CoA dehydrogenase

LEUCINE→	Branched chain aminotransferase Branched-chain alpha-keto acid dehydrogenase complex Isovaleryl coenzyme A dehydrogenase Methylcrotonyl-CoA carboxylase Methylglutaconyl-CoA hydratase 3-hydroxy-3-methylglutaryl-CoA lyase

TRYPTOPHAN→	Indoleamine 2,3-dioxygenase/Tryptophan 2,3-dioxygenase Arylformamidase Kynureninase 3-hydroxyanthranilate oxidase Aminocarboxymuconate-semialdehyde decarboxylase Aminomuconate-semialdehyde dehydrogenase

PHENYLALANINE→tyrosine→	(see below)

G→pyruvate
→citrate

glycine→serine→	Serine hydroxymethyltransferase Serine dehydratase glycine→creatine: Guanidinoacetate N-methyltransferase Creatine kinase

alanine→	Alanine transaminase

cysteine→	D-cysteine desulfhydrase

threonine→	L-threonine dehydrogenase

G→glutamate→
α-ketoglutarate

HISTIDINE→	Histidine ammonia-lyase Urocanate hydratase Formiminotransferase cyclodeaminase

proline→	Proline oxidase Pyrroline-5-carboxylate reductase 1-Pyrroline-5-carboxylate dehydrogenase/ALDH4A1 PYCR1

arginine→	Ornithine aminotransferase Ornithine decarboxylase Agmatinase

→alpha-ketoglutarate→TCA	Glutamate dehydrogenase

Other	cysteine+glutamate→glutathione: Gamma-glutamylcysteine synthetase Glutathione synthetase Gamma-glutamyl transpeptidase glutamate→glutamine: Glutamine synthetase Glutaminase

G→propionyl-CoA→
succinyl-CoA

VALINE→	Branched chain aminotransferase Branched-chain alpha-keto acid dehydrogenase complex Enoyl-CoA hydratase 3-hydroxyisobutyryl-CoA hydrolase 3-hydroxyisobutyrate dehydrogenase Methylmalonate semialdehyde dehydrogenase

ISOLEUCINE→	Branched chain aminotransferase Branched-chain alpha-keto acid dehydrogenase complex 3-hydroxy-2-methylbutyryl-CoA dehydrogenase

METHIONINE→	generation of homocysteine: Methionine adenosyltransferase Adenosylhomocysteinase regeneration of methionine: Methionine synthase/Homocysteine methyltransferase Betaine-homocysteine methyltransferase conversion to cysteine: Cystathionine beta synthase Cystathionine gamma-lyase

THREONINE→	Threonine aldolase

→succinyl-CoA→TCA	Propionyl-CoA carboxylase Methylmalonyl CoA epimerase Methylmalonyl-CoA mutase

G→fumarate

PHENYLALANINE→tyrosine→	Phenylalanine hydroxylase Tyrosine aminotransferase 4-Hydroxyphenylpyruvate dioxygenase Homogentisate 1,2-dioxygenase Fumarylacetoacetate hydrolase tyrosine→melanin: Tyrosinase

G→oxaloacetate

asparagine→aspartate→	Asparaginase/Asparagine synthetase Aspartate transaminase

Protein: scleroproteins

Extracellular matrix

Collagen

Fibril forming	type I COL1A1 COL1A2 type II (COL2A1) type III type V COL5A1 COL5A2 COL5A3 COL24A1 COL26A1

Other	FACIT: type IX COL9A1 COL9A2 COL9A3 type XII (COL12A1) COL14A1 COL16A1 COL19A1 COL20A1 COL21A1 COL22A1 basement membrane: type IV COL4A1 COL4A2 COL4A3 COL4A4 COL4A5 COL4A6 multiplexin: COL15A1 type XVIII COL18A1 Endostatin transmembrane: COL13A1 COL17A1 COL23A1 COL25A1 other: type VI COL6A1 COL6A2 COL6A3 COL6A5 type VII (COL7A1) type VIII COL8A1 COL8A2 type X (COL10A1) type XI COL11A1 COL11A2 COL27A1 COL28A1

Enzymes	Prolyl hydroxylase/Lysyl hydroxylase Cartilage associated protein/Leprecan ADAMTS2 Procollagen peptidase Lysyl oxidase

Laminin

alpha
- LAMA1
- LAMA2
- LAMA3
- LAMA4
- LAMA5
beta
- LAMB1
- LAMB2
- LAMB3
- LAMB4
gamma
- LAMC1
- LAMC2
- LAMC3

Other

Oxidoreductases: dioxygenases, including steroid hydroxylases (EC 1.14)

1.14.11: 2-oxoglutarate	Prolyl hydroxylase Lysyl hydroxylase

1.14.13: NADH or NADPH	Flavin-containing monooxygenase FMO1 FMO2 FMO3 FMO4 FMO5 Nitric oxide synthase NOS1 NOS2 NOS3 Cholesterol 7 alpha-hydroxylase Methane monooxygenase 3A4 Lanosterol 14 alpha-demethylase 24-hydroxycholesterol 7α-hydroxylase

1.14.14: reduced flavin or flavoprotein	19A1 2D6 2E1

1.14.15: reduced iron-sulfur protein	11B1 11B2 11A1

1.14.16: reduced pteridine (BH4 dependent)	Phenylalanine hydroxylase Tyrosine hydroxylase Tryptophan hydroxylase

1.14.17: reduced ascorbate	Dopamine beta-hydroxylase

1.14.18-19: other	Tyrosinase Stearoyl-CoA desaturase-1

1.14.99 - miscellaneous	Cyclooxygenase Heme oxygenase (HMOX1) Squalene monooxygenase 17A1 21A2

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

This article is issued from Wikipedia - version of the 7/2/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.