>gnl|CDD|107202 cd00640, Trp-synth-beta_II, Tryptophan synthase beta superfamily (fold type II); this family of pyridoxal phosphate (PLP)-dependent enzymes catalyzes beta-replacement and beta-elimination reactions. This CD corresponds to aminocyclopropane-1-carboxylate deaminase (ACCD), tryptophan synthase beta chain (Trp-synth_B), cystathionine beta-synthase (CBS), O-acetylserine sulfhydrylase (CS), serine dehydratase (Ser-dehyd), threonine dehydratase (Thr-dehyd), diaminopropionate ammonia lyase (DAL), and threonine synthase (Thr-synth). ACCD catalyzes the conversion of 1-aminocyclopropane-1-carboxylate to alpha-ketobutyrate and ammonia. Tryptophan synthase folds into a tetramer, where the beta chain is the catalytic PLP-binding subunit and catalyzes the formation of L-tryptophan from indole and L-serine. CBS is a tetrameric hemeprotein that catalyzes condensation of serine and homocysteine to cystathionine. CS is a homodimer that catalyzes the formation of L-cysteine from O-acetyl-L-serine. Ser-dehyd catalyzes the conversion of L- or D-serine to pyruvate and ammonia. Thr-dehyd is active as a homodimer and catalyzes the conversion of L-threonine to 2-oxobutanoate and ammonia. DAL is also a homodimer and catalyzes the alpha, beta-elimination reaction of both L- and D-alpha, beta-diaminopropionate to form pyruvate and ammonia. Thr-synth catalyzes the formation of threonine and inorganic phosphate from O-phosphohomoserine.. Length = 244

 Score =  132 bits (335), Expect = 2e-31
 Identities = 57/202 (28%), Positives = 78/202 (38%), Gaps = 21/202 (10%)

Query: 89  TPLIQLN-------ANEFLLELFHGPTLSFKDIAMQFIAELMDHILEERDHYITIVGATS 141
           TPL++L        AN +L   F  PT SFKD     +  L +   E +     I+ +T 
Sbjct: 1   TPLVRLKRLSKLGGANIYLKLEFLNPTGSFKDRGALNLILLAEE--EGKLPKGVIIESTG 58

Query: 142 GDTGAAAIKAFAGKKRINMYILFPEGRISVVQQKQMTTSEASNINVIAVQSSFDDCQKIV 201
           G+TG A   A A +  +   I+ PEG  S  +  QM    A    V+ V   FDD   + 
Sbjct: 59  GNTGIALAAAAA-RLGLKCTIVMPEGA-SPEKVAQM---RALGAEVVLVPGDFDDAIALA 113

Query: 202 KNLFSDVFFCHSVNLSGINSINWARIMAQIVYYFVSSIALGSPNRNI-SFSVPTGNFGDI 260
           K L  +    + VN       N A I  Q        I      +   +  VP G  G+I
Sbjct: 114 KELAEEDPGAYYVN----QFDNPANIAGQGTIGL--EILEQLGGQKPDAVVVPVGGGGNI 167

Query: 261 FAGYMAKMMGLPIEKLIIATNE 282
                A    LP  K+I    E
Sbjct: 168 AGIARALKELLPNVKVIGVEPE 189