Physicochemical Properties of Peptide



PPepDB ID:PPepDB_712
Number of amino acids:103
Molecular Weight:11008.3 Da
Theoretical pI:7.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)76.8%
Cysteine CYS (C)1211.65%
Glutamic Acid GLU (E)54.85%
Aspartic Acid ASP (D)54.85%
Glycine GLY (G)76.8%
Phynylalanine PHE (F)32.91%
Isoleucine ILE (I)54.85%
Histidine HIS (H)00%
Lysine LYS (K)54.85%
Methionine MET (M)00%
Leucine LEU (L)43.88%
Asparagine ASN (N)76.8%
Glutamine GLN (Q)32.91%
Proline PRO (P)54.85%
Serine SER (S)1312.62%
Arginine ARG (R)65.83%
Threonine THR (T)98.74%
Tryptophan TRP (W)00%
Valine VAL (V)43.88%
Tyrosine TYR (Y)32.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC453
HydrogenH728
NitrogenN136
OxygenO159
SulphurS12

FormulaC453H728N136O159S12
Total Number of Atoms:1488


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):10
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    5220
Absorption 0.1% (=1 g/l)    0.474,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.406,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.39

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.45, 31.07, 15.53]

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:52.136
Grand average of hydropathicity (GRAVY):-0.41