Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5277
Number of amino acids:280
Molecular Weight:29169.51 Da
Theoretical pI:5.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3010.71%
Cysteine CYS (C)20.71%
Glutamic Acid GLU (E)155.36%
Aspartic Acid ASP (D)93.21%
Glycine GLY (G)207.14%
Phynylalanine PHE (F)93.21%
Isoleucine ILE (I)134.64%
Histidine HIS (H)10.36%
Lysine LYS (K)196.79%
Methionine MET (M)62.14%
Leucine LEU (L)2810%
Asparagine ASN (N)124.29%
Glutamine GLN (Q)72.5%
Proline PRO (P)3010.71%
Serine SER (S)2910.36%
Arginine ARG (R)41.43%
Threonine THR (T)196.79%
Tryptophan TRP (W)00%
Valine VAL (V)207.14%
Tyrosine TYR (Y)72.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1307
HydrogenH2100
NitrogenN332
OxygenO403
SulphurS8

FormulaC1307H2100N332O403S8
Total Number of Atoms:4150


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):24
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    10555
Absorption 0.1% (=1 g/l)    0.362,   assuming all pairs of CYS residues form cystines

Ext. coefficient    10430
Absorption 0.1% (=1 g/l)    0.358,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.12

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.50, 32.50, 28.21]

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:88.5357
Grand average of hydropathicity (GRAVY):-0.01