RPSBLAST alignment for GI: 254780889 and conserved domain: cd04633

>gnl|CDD|73131 cd04633, CBS_pair_20, The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).. Length = 121
 Score = 60.2 bits (146), Expect = 1e-09
 Identities = 40/123 (32%), Positives = 66/123 (53%), Gaps = 18/123 (14%)

Query: 101 NPVTISPYATLADALALMKKYSISGIPVVESDVGKLVGILTNRDVRFA--------SNAQ 152
             +T+SP   ++ A  LM  + IS +PV+E   GKLVGI+T +D+  A         +  
Sbjct: 2   PVITVSPDDRVSHARRLMLDHDISRLPVIEG--GKLVGIVTEKDIADALRSFRPLVRDRH 59

Query: 153 QA-------VGELMTRNLITVKKTVNLENAKALLHQHRIEKLLVVDDDGCCIGLITVKDI 205
           Q        V ++MTR +IT++   ++ +  +L+ ++ I  L VV DDG  +G++T  DI
Sbjct: 60  QERRIRNLPVSDIMTRPVITIEPDTSVSDVASLMLENNIGGLPVV-DDGKLVGIVTRTDI 118

Query: 206 ERS 208
            R 
Sbjct: 119 LRY 121