CATH Classification
| Level | CATH Code | Description | 
|---|---|---|
 
	 | 
    1 | Mainly Alpha | 
 
	 | 
    1.20 | Up-down Bundle | 
 
	 | 
    1.20.200 | Fumarase C; Chain A, domain 2 | 
 
	 | 
    1.20.200.10 | Fumarase/aspartase (Central domain) | 
Domain Context
CATH Clusters
| Superfamily | Fumarase/aspartase (Central domain) | 
| Functional Family | Histidine ammonia-lyase | 
Enzyme Information
| 4.3.1.3 | 
							 Histidine ammonia-lyase. 
							based on mapping to UniProt P21310 		
							L-histidine = urocanate + NH(3). 
							-!- Member of the aromatic amino acid lyase family, other members of which are EC 4.3.1.23, EC 4.3.1.24 and EC 4.3.1.25. -!- Catalyzes the first step in the degradation of histidine and the product, urocanic acid, is further metabolized to glutamate. 
						 | 
					
UniProtKB Entries (1)
| P21310 | 
						 HUTH_PSEPU 
						Pseudomonas putida 
						Histidine ammonia-lyase 
					 | 
				
PDB Structure
| PDB | 1B8F | 
| External Links | |
| Method | X-RAY DIFFRACTION | 
| Organism | |
| Primary Citation | 
					 Crystal structure of histidine ammonia-lyase revealing a novel polypeptide modification as the catalytic electrophile. 
					    
					    Biochemistry 
					    
					 | 
			
