Physicochemical Properties of Peptide



PPepDB ID:PPepDB_592
Number of amino acids:105
Molecular Weight:10974.88 Da
Theoretical pI:5.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)109.52%
Cysteine CYS (C)65.71%
Glutamic Acid GLU (E)65.71%
Aspartic Acid ASP (D)32.86%
Glycine GLY (G)76.67%
Phynylalanine PHE (F)43.81%
Isoleucine ILE (I)109.52%
Histidine HIS (H)00%
Lysine LYS (K)65.71%
Methionine MET (M)10.95%
Leucine LEU (L)109.52%
Asparagine ASN (N)65.71%
Glutamine GLN (Q)10.95%
Proline PRO (P)54.76%
Serine SER (S)98.57%
Arginine ARG (R)21.9%
Threonine THR (T)76.67%
Tryptophan TRP (W)00%
Valine VAL (V)1110.48%
Tyrosine TYR (Y)10.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC486
HydrogenH802
NitrogenN124
OxygenO148
SulphurS7

FormulaC486H802N124O148S7
Total Number of Atoms:1567


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):9
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    1865
Absorption 0.1% (=1 g/l)    0.170,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.136,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.29, 25.71, 25.71]

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:114.191
Grand average of hydropathicity (GRAVY):0.60