Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4753
Number of amino acids:315
Molecular Weight:34212.85 Da
Theoretical pI:9.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.62%
Cysteine CYS (C)30.95%
Glutamic Acid GLU (E)196.03%
Aspartic Acid ASP (D)92.86%
Glycine GLY (G)278.57%
Phynylalanine PHE (F)185.71%
Isoleucine ILE (I)216.67%
Histidine HIS (H)10.32%
Lysine LYS (K)278.57%
Methionine MET (M)41.27%
Leucine LEU (L)288.89%
Asparagine ASN (N)165.08%
Glutamine GLN (Q)144.44%
Proline PRO (P)247.62%
Serine SER (S)154.76%
Arginine ARG (R)72.22%
Threonine THR (T)154.76%
Tryptophan TRP (W)00%
Valine VAL (V)3210.16%
Tyrosine TYR (Y)113.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1570
HydrogenH2491
NitrogenN395
OxygenO443
SulphurS7

FormulaC1570H2491N395O443S7
Total Number of Atoms:4906


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):28
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    16515
Absorption 0.1% (=1 g/l)    0.483,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16390
Absorption 0.1% (=1 g/l)    0.479,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.55

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.92, 26.03, 23.81]

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:97.746
Grand average of hydropathicity (GRAVY):0.05