Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2699
Number of amino acids:45
Molecular Weight:5349.26 Da
Theoretical pI:6.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)12.22%
Glutamic Acid GLU (E)511.11%
Aspartic Acid ASP (D)12.22%
Glycine GLY (G)12.22%
Phynylalanine PHE (F)24.44%
Isoleucine ILE (I)36.67%
Histidine HIS (H)36.67%
Lysine LYS (K)36.67%
Methionine MET (M)12.22%
Leucine LEU (L)613.33%
Asparagine ASN (N)12.22%
Glutamine GLN (Q)12.22%
Proline PRO (P)48.89%
Serine SER (S)48.89%
Arginine ARG (R)36.67%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)48.89%
Tyrosine TYR (Y)24.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC244
HydrogenH385
NitrogenN65
OxygenO66
SulphurS2

FormulaC244H385N65O66S2
Total Number of Atoms:762


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.557,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.557,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.06

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.78, 22.22, 26.67]

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:103.778
Grand average of hydropathicity (GRAVY):-0.27