PBGD (porphobilinogen deaminase), also designated hydroxymethylbilane synthase, is a cytoplasmic enzyme found in the heme synthesis pathway. PBGD belongs to the HMBS (hydroxymethylbilane synthase) family. Deficiency of PBGD causes errors in pyrrole metabolism, which in turn leads to an inherited autosomal disorder called acute intermittent porphyria (AIP). AIP is characterized by acute attacks of neurological dysfunctions with hypertension, tachycardia, peripheral neurologic disturbances, abdominal pain and excessive amounts of aminolevulinic acid and porphobilinogen in the urine.
Background References
1. Yang J., et al. 2015. A novel mutation in the porphobilinogen deaminase gene in an extended Chinese family with acute intermittent porphyria. Gene 565:288-290.
2. Gonzaga A.D., et al. 2015. Hydroxymethylbilane synthase gene mutations and polymorphisms in Brazilian families with acute intermittent porphyria. Ann. Hum. Genet. 79:162-172.
Sequence Similarity
Belongs to the HMBS family.
Tissue Specificity
Isoform 1 is ubiquitously expressed. Isoform 2 is found only in erythroid cells.
Western blot analysis of HMBS on different lysates. Proteins were transferred to a PVDF membrane and blocked with 5% BSA in PBS for 1 hour at room temperature. The primary antibody (ET1610-91, 1/500) was used in 5% BSA at room temperature for 2 hours. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:200,000 dilution was used for 1 hour at room temperature. Positive control: Lane 1: Hela cell lysate Lane 2: 293T cell lysate
Western blot analysis of HMBS on K562 cell lysates with Rabbit anti-HMBS antibody (ET1610-91) at 1/500 dilution.
Lysates/proteins at 10 µg/Lane.
Predicted band size: 39 kDa Observed band size: 41 kDa
Exposure time: 30 seconds;
10% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ET1610-91) at 1/500 dilution was used in 5% NFDM/TBST at room temperature for 2 hours. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:200,000 dilution was used for 1 hour at room temperature.
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