Structure of PDB 7lnj Chain C

Receptor sequence

>7lnjC (length=539) Species: 272563 (Clostridioides difficile 630)

GIYYTPKIIVDYIVKKTLKNHDIIKNPYPRILDISCGCGNFLLEVYDILY
DLFEENIYELKKKYDENYWTVDNIHRHILNYCIYGADIDEKAISILKDSL
TNIKINLFCCDSLKKKWRYKFDYIVGNPPYIGHKKLEKKYKKFLLEKYSE
VYKDKADLYFCFYKKIIDILKQGGIGSVITPRYFLESLSGKDLREYIKSN
VNVQEIVDFLGANIFKNIGVSSCILTFDKKKTKETYIDVFKIKNEDICIN
KFETLEELLKSSKFEHFNINQRLLSDEWILVNKDDETFYNKIQEKCKYSL
EDIAISFQGIITGCDKAFILSKDDVKLNLVDDKFLKCWIKSKNINKYIVD
KSEYRLIYSNDIDNENTNKRILDEIIGLYKTKLENRRECKSGIRKWYELQ
WGREKLFFERKKIMYPYKSNENRFAIDYDNNFSSADVYSFFIKEEYLDKF
SYEYLVGILNSSVYDKYFKITAKKMSKNIYDYYPNKVMKIRIFRDNNYEE
IENLSKQIISILLNKSIDKGKVEKLQIKMDNLIMDSLGI

3D structure

• PDB: 7lnj Clostridioides difficile specific DNA adenine methyltransferase CamA squeezes and flips adenine out of DNA helix.
• Chain: C
• Resolution: 2.68 Å

Enzymatic activity

• Enzyme Commision number: 2.1.1.72: site-specific DNA-methyltransferase (adenine-specific).

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	dna	C	Y30 N165 Y168 K173 K193 Y221 S227 F253 I256 G257 Q346 I431 R432 W439 R441 K456 Y476 K511 M513 S514 Y521 P522 N523	Y3 N127 Y130 K135 K155 Y183 S189 F215 I218 G219 Q308 I393 R394 W401 R403 K418 Y438 K473 M475 S476 Y483 P484 N485
BS02	dna	C	H171 K172 K179 D192 K193 I349 G351 D353 K378 S379 K380 R425 Q438 W439 Y455	H133 K134 K141 D154 K155 I311 G313 D315 K340 S341 K342 R387 Q400 W401 Y417

Gene Ontology

Molecular Function

• GO:0003676 nucleic acid binding
• GO:0008168 methyltransferase activity
• GO:0009007 site-specific DNA-methyltransferase (adenine-specific) activity

Biological Process

• GO:0006304 DNA modification
• GO:0032259 methylation

External links

• PDB: RCSB:7lnj, PDBe:7lnj, PDBj:7lnj
• PDBsum: 7lnj
• PubMed: 34103525
• UniProt: Q183J3