Reviewed, UniProtKB/Swiss-Prot Q8T1G6 (LYSB_DICDI)

Names and origin

Protein names

Recommended name:
    Lysozyme B
    EC=3.2.1.17
Alternative name(s):
    1,4-beta-N-acetylmuramidase B

Gene names

Name:	alyB
ORF Names:	DDB_G0275119

Organism

Dictyostelium discoideum (Slime mold) [Complete proteome]

Taxonomic identifier

44689 [NCBI]

Taxonomic lineage

Eukaryota › Amoebozoa › Mycetozoa › Dictyosteliida › Dictyostelium

Protein attributes

Sequence length	181 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Has antibacterial activity By similarity.
Catalytic activity	Hydrolysis of (1->4)-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins.
Subcellular location	Cytoplasmic vesicle lumen By similarity.
Post-translational modification	Contains six disulfide bonds By similarity.
Sequence similarities	Belongs to the dictyostelium lysozyme family.

Ontologies

Keywords
Cellular component	Cytoplasmic vesicle
Domain	Signal
Molecular function	Antibiotic Antimicrobial Bacteriolytic enzyme Glycosidase Hydrolase
PTM	Disulfide bond
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	cytolysis Inferred from electronic annotation. Source: UniProtKB-KW defense response to Gram-positive bacterium Inferred from sequence or structural similarity. Source: UniProtKB metabolic process Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	cytoplasmic membrane-bounded vesicle lumen Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	lysozyme activity Inferred from sequence or structural similarity. Source: UniProtKB
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Signal peptide	1 – 19	19	By similarity
	Chain	20 – 138	119	Lysozyme B		PRO_0000315916
	Propeptide	139 – 181	43	By similarity		PRO_0000315917

Sequences

	Sequence		Length	Mass (Da)
	Q8T1G6-1 [UniParc]. Last modified June 1, 2002. Version 1. Checksum: C505C07DBE8E4580	FASTA	181	19,535
	10 20 30 40 50 60 MRISFFLLIL AVIIGYAYGY SCPKPCYGNM CCSTSPGNKY YLTDFCGSTS ACGPVPSCSG 70 80 90 100 110 120 ALYFTADSQR FGCGKHLNLC RGSKCVKAQI YDAGPAMWVE QDAGMMIIDA SPTICHVLTG 130 140 150 160 170 180 GSSCGWSDKF EITATVTSLT DSRPLGPFNV TEEEKAQLFI DHEIAMAQCE AEKTCNGFDL E

References

[1]	"Sequence and analysis of chromosome 2 of Dictyostelium discoideum." Gloeckner G., Eichinger L., Szafranski K., Pachebat J.A., Bankier A.T., Dear P.H., Lehmann R., Baumgart C., Parra G., Abril J.F., Guigo R., Kumpf K., Tunggal B., Cox E.C., Quail M.A., Platzer M., Rosenthal A., Noegel A.A. Nature 418:79-85(2002) [PubMed: 12097910] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: AX4.
[2]	"The genome of the social amoeba Dictyostelium discoideum." Eichinger L., Pachebat J.A., Gloeckner G., Rajandream M.A., Sucgang R., Berriman M., Song J., Olsen R., Szafranski K., Xu Q., Tunggal B., Kummerfeld S., Madera M., Konfortov B.A., Rivero F., Bankier A.T., Lehmann R., Hamlin N. , Davies R., Gaudet P., Fey P., Pilcher K., Chen G., Saunders D., Sodergren E.J., Davis P., Kerhornou A., Nie X., Hall N., Anjard C., Hemphill L., Bason N., Farbrother P., Desany B., Just E., Morio T., Rost R., Churcher C.M., Cooper J., Haydock S., van Driessche N., Cronin A., Goodhead I., Muzny D.M., Mourier T., Pain A., Lu M., Harper D., Lindsay R., Hauser H., James K.D., Quiles M., Madan Babu M., Saito T., Buchrieser C., Wardroper A., Felder M., Thangavelu M., Johnson D., Knights A., Loulseged H., Mungall K.L., Oliver K., Price C., Quail M.A., Urushihara H., Hernandez J., Rabbinowitsch E., Steffen D., Sanders M., Ma J., Kohara Y., Sharp S., Simmonds M.N., Spiegler S., Tivey A., Sugano S., White B., Walker D., Woodward J.R., Winckler T., Tanaka Y., Shaulsky G., Schleicher M., Weinstock G.M., Rosenthal A., Cox E.C., Chisholm R.L., Gibbs R.A., Loomis W.F., Platzer M., Kay R.R., Williams J.G., Dear P.H., Noegel A.A., Barrell B.G., Kuspa A. Nature 435:43-57(2005) [PubMed: 15875012] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: AX4.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AC116305 Genomic DNA. Translation: AAM08432.1. AAFI02000013 Genomic DNA. Translation: EAL69840.1.
RefSeq	XP_643741.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3394889.
GenomeReviews	Gene locus alyB in contig CM000151_GR.
KEGG	ddi:DDB_0231278.
Organism-specific databases
dictyBase	DDB_G0275119. alyB.
Enzyme and pathway databases
BRENDA	3.2.1.17. 424.
Family and domain databases
ProtoNet	Search...

Entry information

Entry name

LYSB_DICDI

Accession

Primary (citable) accession number: Q8T1G6
Secondary accession number(s): Q554H0

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 5, 2008
Last sequence update:	June 1, 2002
Last modified:	September 22, 2009
This is version 27 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)