Introduction
Adenylosuccinate lyase (ADSL) is an essential enzyme in the purine nucleotide cycle, facilitating the conversion of adenylosuccinate to AMP and fumarate. This enzyme plays a crucial role in both the de novo synthesis of purines and the generation of adenosine monophosphate from inosine monophosphate. Specifically, ADSL catalyzes two key reactions in AMP biosynthesis: the removal of fumarate from succinylaminoimidazole carboxamide ribotide (SAICA) to produce aminoimidazole carboxamide ribotide (AICA) and the removal of fumarate from adenylosuccinate to yield AMP. Defects in ADSL lead to adenylosuccinate lyase deficiency (ADSL deficiency), an autosomal recessive disorder. This deficiency is characterized by the accumulation of succinylaminoimidazole-carboxamide riboside (SAICA-riboside) and succinyladenosine (S-Ado) in bodily fluids. ADSL deficiency manifests as succinylpurinemic autism, psychomotor retardation, and, in some instances, growth retardation accompanied by muscle wasting and epilepsy.
Description
Recombinantly produced in E. coli, ADSL Human is a single, non-glycosylated polypeptide chain. It comprises 520 amino acids, with amino acids 1-484 corresponding to the ADSL protein, and has a molecular weight of 59 kDa. A 36 amino acid His-tag is fused to the N-terminus of the protein. Purification is achieved using proprietary chromatographic techniques.
Physical Appearance
A clear, colorless solution that has been sterilized by filtration.
Formulation
The ADSL solution is provided at a concentration of 1 mg/ml in a buffer consisting of 20 mM Tris-HCl (pH 8.0), 1 mM DTT, 40% glycerol, and 0.1 M NaCl.
Stability
For short-term storage (up to 2-4 weeks), store the ADSL solution at 4°C. For long-term storage, freeze the solution at -20°C. It is highly recommended to add a carrier protein such as HSA or BSA (0.1%) for extended storage. Repeated freezing and thawing should be avoided.
Purity
SDS-PAGE analysis indicates a purity greater than 95%.
Synonyms
Adenylosuccinate lyase, ASL, Adenylosuccinase, ASase, ADSL, AMPS.
Amino Acid Sequence
MRGSHHHHHH GMASMTGGQQ MGRDLYDDDD KDRWGSMAAG GDHGSPDSYR SPLASRYASP EMCFVFSDRY KFRTWRQLWL WLAEAEQTLG LPITDEQIQE MKSNLENIDF KMAAEEEKRL RHDVMAHVHT FGHCCPKAAG IIHLGATSCY VGDNTDLIIL RNALDLLLPK LARVISRLAD FAKERASLPT LGFTHFQPAQ LTTVGKRCCL WIQDLCMDLQ NLKRVRDDLR FRGVKGTTGT QASFLQLFEG DDHKVEQLDK MVTEKAGFKR AFIITGQTYT RKVDIEVLSV LASLGASVHK ICTDIRLLAN LKEMEEPFEK QQIGSSAMPY KRNPMRSERC CSLARHLMTL VMDPLQTASV QWFERTLDDS ANRRICLAEA FLTADTILNT LQNISEGLVV YPKVIERRIR QELPFMATEN IIMAMVKAGG SRQDCHEKIR VLSQQAASVV KQEGGDNDLI ERIQVDAYFS PIHSQLDHLL DPSSFTGRAS QQVQRFLEEE VYPLLKPYES VMKVKAELCL.