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YpeB dimerization may be required to stabilize SleB for effective germination of Bacillus anthracis spores.

Sayer CV, Popham DL.

BMC Microbiol. 2019 Jul 26;19(1):169. doi: 10.1186/s12866-019-1544-1.


Identification of L-Valine-initiated-germination-active genes in Bacillus subtilis using Tn-seq.

Sayer CV, Barat B, Popham DL.

PLoS One. 2019 Jun 14;14(6):e0218220. doi: 10.1371/journal.pone.0218220. eCollection 2019.


Membrane Proteomes and Ion Transporters in Bacillus anthracis and Bacillus subtilis Dormant and Germinating Spores.

Chen Y, Barat B, Ray WK, Helm RF, Melville SB, Popham DL.

J Bacteriol. 2019 Feb 25;201(6). pii: e00662-18. doi: 10.1128/JB.00662-18. Print 2019 Mar 15.


Clostridium difficile Lipoprotein GerS Is Required for Cortex Modification and Thus Spore Germination.

Diaz OR, Sayer CV, Popham DL, Shen A.

mSphere. 2018 Jun 27;3(3). pii: e00205-18. doi: 10.1128/mSphere.00205-18. Print 2018 Jun 27.


Vibrio fischeri DarR Directs Responses to d-Aspartate and Represents a Group of Similar LysR-Type Transcriptional Regulators.

Jones RM Jr, Popham DL, Schmidt AL, Neidle EL, Stabb EV.

J Bacteriol. 2018 Jul 10;200(15). pii: e00773-17. doi: 10.1128/JB.00773-17. Print 2018 Aug 1.


Using a Concept Inventory to Reveal Student Thinking Associated with Common Misconceptions about Antibiotic Resistance.

Stevens AM, Smith AC, Marbach-Ad G, Balcom SA, Buchner J, Daniel SL, DeStefano JJ, El-Sayed NM, Frauwirth K, Lee VT, McIver KS, Melville SB, Mosser DM, Popham DL, Scharf BE, Schubot FD, Seyler RW Jr, Shields PA, Song W, Stein DC, Stewart RC, Thompson KV, Yang Z, Yarwood SA.

J Microbiol Biol Educ. 2017 Apr 21;18(1). pii: 18.1.10. doi: 10.1128/jmbe.v18i1.1281. eCollection 2017 Apr.


Spore Peptidoglycan.

Popham DL, Bernhards CB.

Microbiol Spectr. 2015 Dec;3(6). doi: 10.1128/microbiolspec.TBS-0005-2012. Review.


Analysis of the Spore Membrane Proteome in Clostridium perfringens Implicates Cyanophycin in Spore Assembly.

Liu H, Ray WK, Helm RF, Popham DL, Melville SB.

J Bacteriol. 2016 May 27;198(12):1773-1782. doi: 10.1128/JB.00212-16. Print 2016 Jun 15.


Transcriptional Profiling of Coxiella burnetii Reveals Extensive Cell Wall Remodeling in the Small Cell Variant Developmental Form.

Sandoz KM, Popham DL, Beare PA, Sturdevant DE, Hansen B, Nair V, Heinzen RA.

PLoS One. 2016 Feb 24;11(2):e0149957. doi: 10.1371/journal.pone.0149957. eCollection 2016.


A Quality-Control Mechanism Removes Unfit Cells from a Population of Sporulating Bacteria.

Tan IS, Weiss CA, Popham DL, Ramamurthi KS.

Dev Cell. 2015 Sep 28;34(6):682-93. doi: 10.1016/j.devcel.2015.08.009. Epub 2015 Sep 17.


Lytic enzyme-assisted germination of Bacillus anthracis and Bacillus subtilis spores.

Blankenship BG, Heffron JD, Popham DL.

J Appl Microbiol. 2015 Aug;119(2):521-8. doi: 10.1111/jam.12839. Epub 2015 May 31.


HtrC is involved in proteolysis of YpeB during germination of Bacillus anthracis and Bacillus subtilis spores.

Bernhards CB, Chen Y, Toutkoushian H, Popham DL.

J Bacteriol. 2015 Jan;197(2):326-36. doi: 10.1128/JB.02344-14. Epub 2014 Nov 10.


Role of YpeB in cortex hydrolysis during germination of Bacillus anthracis spores.

Bernhards CB, Popham DL.

J Bacteriol. 2014 Oct;196(19):3399-409. doi: 10.1128/JB.01899-14. Epub 2014 Jul 14.


The bacterial septal ring protein RlpA is a lytic transglycosylase that contributes to rod shape and daughter cell separation in Pseudomonas aeruginosa.

Jorgenson MA, Chen Y, Yahashiri A, Popham DL, Weiss DS.

Mol Microbiol. 2014 Jul;93(1):113-28. doi: 10.1111/mmi.12643. Epub 2014 May 23.


Levels of germination proteins in Bacillus subtilis dormant, superdormant, and germinating spores.

Chen Y, Ray WK, Helm RF, Melville SB, Popham DL.

PLoS One. 2014 Apr 21;9(4):e95781. doi: 10.1371/journal.pone.0095781. eCollection 2014.


Hypermotility in Clostridium perfringens strain SM101 is due to spontaneous mutations in genes linked to cell division.

Liu H, McCord KD, Howarth J, Popham DL, Jensen RV, Melville SB.

J Bacteriol. 2014 Jul;196(13):2405-12. doi: 10.1128/JB.01614-14. Epub 2014 Apr 18.


Clostridium difficile extracytoplasmic function σ factor σV regulates lysozyme resistance and is necessary for pathogenesis in the hamster model of infection.

Ho TD, Williams KB, Chen Y, Helm RF, Popham DL, Ellermeier CD.

Infect Immun. 2014 Jun;82(6):2345-55. doi: 10.1128/IAI.01483-13. Epub 2014 Mar 24.


Dustborne and airborne Gram-positive and Gram-negative bacteria in high versus low ERMI homes.

Adhikari A, Kettleson EM, Vesper S, Kumar S, Popham DL, Schaffer C, Indugula R, Chatterjee K, Allam KK, Grinshpun SA, Reponen T.

Sci Total Environ. 2014 Jun 1;482-483:92-9. doi: 10.1016/j.scitotenv.2014.02.110. Epub 2014 Mar 15.


Identification of SPOR domain amino acids important for septal localization, peptidoglycan binding, and a disulfide bond in the cell division protein FtsN.

Duncan TR, Yahashiri A, Arends SJ, Popham DL, Weiss DS.

J Bacteriol. 2013 Dec;195(23):5308-15. doi: 10.1128/JB.00911-13. Epub 2013 Sep 20.


Visualizing the production and arrangement of peptidoglycan in Gram-positive cells.

Popham DL.

Mol Microbiol. 2013 May;88(4):645-9. doi: 10.1111/mmi.12212. Epub 2013 Apr 1.


Nuclear magnetic resonance solution structure of the peptidoglycan-binding SPOR domain from Escherichia coli DamX: insights into septal localization.

Williams KB, Yahashiri A, Arends SJ, Popham DL, Fowler CA, Weiss DS.

Biochemistry. 2013 Jan 29;52(4):627-39. doi: 10.1021/bi301609e. Epub 2013 Jan 14.


The catalytic domain of the germination-specific lytic transglycosylase SleB from Bacillus anthracis displays a unique active site topology.

Jing X, Robinson HR, Heffron JD, Popham DL, Schubot FD.

Proteins. 2012 Oct;80(10):2469-75. doi: 10.1002/prot.24140. Epub 2012 Jul 31.


In vitro and in vivo analyses of the Bacillus anthracis spore cortex lytic protein SleL.

Lambert EA, Sherry N, Popham DL.

Microbiology. 2012 May;158(Pt 5):1359-1368. doi: 10.1099/mic.0.056630-0. Epub 2012 Feb 16.


Lactobacillus brantae sp. nov., isolated from faeces of Canada geese (Branta canadensis).

Volokhov DV, Amselle M, Beck BJ, Popham DL, Whittaker P, Wang H, Kerrigan E, Chizhikov VE.

Int J Syst Evol Microbiol. 2012 Sep;62(Pt 9):2068-76. doi: 10.1099/ijs.0.033852-0. Epub 2011 Oct 21.


Reduction in membrane phosphatidylglycerol content leads to daptomycin resistance in Bacillus subtilis.

Hachmann AB, Sevim E, Gaballa A, Popham DL, Antelmann H, Helmann JD.

Antimicrob Agents Chemother. 2011 Sep;55(9):4326-37. doi: 10.1128/AAC.01819-10. Epub 2011 Jun 27.


In vitro studies of peptidoglycan binding and hydrolysis by the Bacillus anthracis germination-specific lytic enzyme SleB.

Heffron JD, Sherry N, Popham DL.

J Bacteriol. 2011 Jan;193(1):125-31. doi: 10.1128/JB.00869-10. Epub 2010 Oct 22.


EtfA catalyses the formation of dipicolinic acid in Clostridium perfringens.

Orsburn BC, Melville SB, Popham DL.

Mol Microbiol. 2010 Jan;75(1):178-86. doi: 10.1111/j.1365-2958.2009.06975.x. Epub 2009 Dec 3.


Contributions of four cortex lytic enzymes to germination of Bacillus anthracis spores.

Heffron JD, Lambert EA, Sherry N, Popham DL.

J Bacteriol. 2010 Feb;192(3):763-70. doi: 10.1128/JB.01380-09. Epub 2009 Dec 4.


Discovery and characterization of three new Escherichia coli septal ring proteins that contain a SPOR domain: DamX, DedD, and RlpA.

Arends SJ, Williams K, Scott RJ, Rolong S, Popham DL, Weiss DS.

J Bacteriol. 2010 Jan;192(1):242-55. doi: 10.1128/JB.01244-09.


Homologues of the Bacillus subtilis SpoVB protein are involved in cell wall metabolism.

Vasudevan P, McElligott J, Attkisson C, Betteken M, Popham DL.

J Bacteriol. 2009 Oct;191(19):6012-9. doi: 10.1128/JB.00604-09. Epub 2009 Jul 31.


Shared catalysis in virus entry and bacterial cell wall depolymerization.

Cohen DN, Sham YY, Haugstad GD, Xiang Y, Rossmann MG, Anderson DL, Popham DL.

J Mol Biol. 2009 Apr 3;387(3):607-18. doi: 10.1016/j.jmb.2009.02.001. Epub 2009 Feb 9.


The SpmA/B and DacF proteins of Clostridium perfringens play important roles in spore heat resistance.

Orsburn B, Sucre K, Popham DL, Melville SB.

FEMS Microbiol Lett. 2009 Feb;291(2):188-94.


Roles of germination-specific lytic enzymes CwlJ and SleB in Bacillus anthracis.

Heffron JD, Orsburn B, Popham DL.

J Bacteriol. 2009 Apr;191(7):2237-47. doi: 10.1128/JB.01598-08. Epub 2009 Jan 30.


A eukaryotic-like Ser/Thr kinase signals bacteria to exit dormancy in response to peptidoglycan fragments.

Shah IM, Laaberki MH, Popham DL, Dworkin J.

Cell. 2008 Oct 31;135(3):486-96. doi: 10.1016/j.cell.2008.08.039.


The Bacillus anthracis SleL (YaaH) protein is an N-acetylglucosaminidase involved in spore cortex depolymerization.

Lambert EA, Popham DL.

J Bacteriol. 2008 Dec;190(23):7601-7. doi: 10.1128/JB.01054-08. Epub 2008 Oct 3.


Cortex peptidoglycan lytic activity in germinating Bacillus anthracis spores.

Dowd MM, Orsburn B, Popham DL.

J Bacteriol. 2008 Jul;190(13):4541-8. doi: 10.1128/JB.00249-08. Epub 2008 May 2.


Factors contributing to heat resistance of Clostridium perfringens endospores.

Orsburn B, Melville SB, Popham DL.

Appl Environ Microbiol. 2008 Jun;74(11):3328-35. doi: 10.1128/AEM.02629-07. Epub 2008 Mar 31.


Spore cortex formation in Bacillus subtilis is regulated by accumulation of peptidoglycan precursors under the control of sigma K.

Vasudevan P, Weaver A, Reichert ED, Linnstaedt SD, Popham DL.

Mol Microbiol. 2007 Sep;65(6):1582-94. Epub 2007 Aug 21.


Influence of curli expression by Escherichia coli 0157:H7 on the cell's overall hydrophobicity, charge, and ability to attach to lettuce.

Boyer RR, Sumner SS, Williams RC, Pierson MD, Popham DL, Kniel KE.

J Food Prot. 2007 Jun;70(6):1339-45.


Penicillin-binding protein 1a promotes resistance of group B streptococcus to antimicrobial peptides.

Hamilton A, Popham DL, Carl DJ, Lauth X, Nizet V, Jones AL.

Infect Immun. 2006 Nov;74(11):6179-87.


Daughter cell separation by penicillin-binding proteins and peptidoglycan amidases in Escherichia coli.

Priyadarshini R, Popham DL, Young KD.

J Bacteriol. 2006 Aug;188(15):5345-55.


Sulfur and nitrogen limitation in Escherichia coli K-12: specific homeostatic responses.

Gyaneshwar P, Paliy O, McAuliffe J, Popham DL, Jordan MI, Kustu S.

J Bacteriol. 2005 Feb;187(3):1074-90.


Unmasking novel sporulation genes in Bacillus subtilis.

Silvaggi JM, Popham DL, Driks A, Eichenberger P, Losick R.

J Bacteriol. 2004 Dec;186(23):8089-95.


A mother cell-specific class B penicillin-binding protein, PBP4b, in Bacillus subtilis.

Wei Y, McPherson DC, Popham DL.

J Bacteriol. 2004 Jan;186(1):258-61.


Production of muramic delta-lactam in Bacillus subtilis spore peptidoglycan.

Gilmore ME, Bandyopadhyay D, Dean AM, Linnstaedt SD, Popham DL.

J Bacteriol. 2004 Jan;186(1):80-9.


Role of penicillin-binding proteins in bacterial cell morphogenesis.

Popham DL, Young KD.

Curr Opin Microbiol. 2003 Dec;6(6):594-9. Review.


Rod shape determination by the Bacillus subtilis class B penicillin-binding proteins encoded by pbpA and pbpH.

Wei Y, Havasy T, McPherson DC, Popham DL.

J Bacteriol. 2003 Aug;185(16):4717-26.


Analysis of the properties of spores of Bacillus subtilis prepared at different temperatures.

Melly E, Genest PC, Gilmore ME, Little S, Popham DL, Driks A, Setlow P.

J Appl Microbiol. 2002;92(6):1105-15.


Specialized peptidoglycan of the bacterial endospore: the inner wall of the lockbox.

Popham DL.

Cell Mol Life Sci. 2002 Mar;59(3):426-33.


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