Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5597
Number of amino acids:263
Molecular Weight:28437.98 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.98%
Cysteine CYS (C)72.66%
Glutamic Acid GLU (E)186.84%
Aspartic Acid ASP (D)197.22%
Glycine GLY (G)2911.03%
Phynylalanine PHE (F)114.18%
Isoleucine ILE (I)114.18%
Histidine HIS (H)41.52%
Lysine LYS (K)269.89%
Methionine MET (M)31.14%
Leucine LEU (L)124.56%
Asparagine ASN (N)93.42%
Glutamine GLN (Q)20.76%
Proline PRO (P)166.08%
Serine SER (S)176.46%
Arginine ARG (R)62.28%
Threonine THR (T)186.84%
Tryptophan TRP (W)62.28%
Valine VAL (V)197.22%
Tyrosine TYR (Y)93.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1267
HydrogenH1946
NitrogenN332
OxygenO393
SulphurS10

FormulaC1267H1946N332O393S10
Total Number of Atoms:3948


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    46785
Absorption 0.1% (=1 g/l)    1.645,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46410
Absorption 0.1% (=1 g/l)    1.632,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.86, 27.00, 20.53]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:63.0418
Grand average of hydropathicity (GRAVY):-0.47