Pepsin: Difference between revisions

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Once denatured, pepsin is unable to refold to an active native state upon returning from denaturing conditions. One proposed solution for this is that pepsin formation depends on a separate prosegment (PS) domain. When returning from the denatured state, the denatured pepsin first has to bypass a large folding barrier and then in the presence of PS  the native state can become thermodynamically stable. The PS therefore can catalyze pepsin folding by stabilizing the transition state <ref name="native" /> .  
Once denatured, pepsin is unable to refold to an active native state upon returning from denaturing conditions. One proposed solution for this is that pepsin formation depends on a separate prosegment (PS) domain. When returning from the denatured state, the denatured pepsin first has to bypass a large folding barrier and then in the presence of PS  the native state can become thermodynamically stable. The PS therefore can catalyze pepsin folding by stabilizing the transition state <ref name="native" /> .  
==3D structures of pepsin==
===Pepsin===
[[2h6s]], [[2qzw]] – CaPep residues 59-398 – Candida albicans<br />
[[1s2b]] – SlPep - Scytalidium lignicola<br />
[[1y43]] – Pep – Aspergillus niger<br />
[[1ibq]] - Pep – Aspergillus phoenicis<br />
[[5pep]], [[3pep]], [[4pep]] – pPep – pig<br />
[[1uh7]], [[1uh8]], [[1uh9]], [[2apr]] – RcPep – Rhizopus chinensis<br />
[[1mpp]] – Pep – Rhizomucor pusillus<br />
[[1fmu]], [[1fmx]], [[2jxr]] – yPep – yeast<br />
[[1flh]], [[1psn]] – hPep – human<br />
[[3app]] – PjPep – Penicillium janthinellum<br />
[[1am5]] – Pep – Atlantic cod<br />
[[1er8]], [[3er3]], [[4er1]], [[4ape]], [[1ent]] – CpPep – Cryphonectria parasitica<br />
[[3lzy]], [[1oew]] – CpPep residues 90-419
===Pepsinogen===
[[3psg]], [[2psg]] - pPepn<br />
[[1avf]] - hPepn
===Pepsin complex with inhibitor===
[[2h6t]] - CaPep residues 59-398 + pepstatin<br />
[[1eag]] - CaPep residues 59-398 + inhibitor<br />
[[2qzx]] - CaPep residues 77-418 + pepstatin<br />
[[1j71]] - Pep + peptide – Candida tropicalis<br />
[[2ifr]], [[2ifw]], [[1s2k]] – SlPep + peptide<br />
[[1yx9]] – pPep + DMSO<br />
[[1psa]] – pPep + inhibitor<br />
[[1wkr]] - Pep + pepstatin – Irpex lacteus<br />
[[4apr]], [[5apr]], [[6apr]] - RcPep + pepstatin<br />
[[3apr]] - RcPep + peptide<br />
[[2rmp]] - Pep + pepstatin – Rhizomucor miehei<br />
[[1nlu]], [[1ga1]], [[1ga4]] - PsPep + pseudo-iodotyrostatin – Pseudomonas<br />
[[1kdv]], [[1kdy]] – PsPep + peptide<br />
[[1kdz]], [[1ke1]], [[1ke2]], [[1ga6]] - PsPep + statin inhibitor<br />
[[1g0v]] – yPep + protease A inhibitor<br />
[[1fq4]], [[1fq5]], [[1fq6]], [[1fq7]], [[1fq8]] - yPep + inhibitor<br />
[[1qrp]] – hPep + peptide<br />
[[1pso]] – hPep + pepstatin<br />
[[1bxo]], [[1bxq]], [[2wea]], [[2web]], [[2wec]], [[2wed]] - PjPep + inhibitor <br />
[[1ppk]], [[1apv]], [[1apw]], [[1ppl]], [[1ppm]] – PjPep + peptide analog
[[1apt]], [[1apu]] – PjPep + pepstatin<br />
[[3er5]], [[4er4]], [[5er2]], [[2er0]], [[2er6]], [[2er7]], [[2er9]], [[5er1]], [[1epl]], [[1epm]], [[1epn]], [[1epo]], [[1epp]], [[1epq]], [[1epr]]  – CpPep + peptide<br />
[[4er2]] - CpPep + pepstatin<br />
[[2jji]], [[2jjj]], [[2v00]], [[1od1]], [[1oex]], [[1gvt]], [[1eed]], [[1gvu]], [[1gvv]], [[1gvw]], [[1gvx]], [[1e81]], [[1e82]], [[1e80]], [[1e5o]] – CpPep + inhibitor<br />
[[2vs2]], [[1gkt]] - CpPep + inhibitor - neutron


=References=
=References=

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

David Canner, Jaime Prilusky, Michal Harel, Alexander Berchansky, Joel L. Sussman