Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4500
Number of amino acids:630
Molecular Weight:68959.53 Da
Theoretical pI:7.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)375.87%
Cysteine CYS (C)91.43%
Glutamic Acid GLU (E)253.97%
Aspartic Acid ASP (D)355.56%
Glycine GLY (G)6410.16%
Phynylalanine PHE (F)365.71%
Isoleucine ILE (I)274.29%
Histidine HIS (H)162.54%
Lysine LYS (K)446.98%
Methionine MET (M)111.75%
Leucine LEU (L)325.08%
Asparagine ASN (N)589.21%
Glutamine GLN (Q)162.54%
Proline PRO (P)294.6%
Serine SER (S)548.57%
Arginine ARG (R)152.38%
Threonine THR (T)477.46%
Tryptophan TRP (W)60.95%
Valine VAL (V)386.03%
Tyrosine TYR (Y)314.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3056
HydrogenH4625
NitrogenN831
OxygenO957
SulphurS20

FormulaC3056H4625N831O957S20
Total Number of Atoms:9489


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):60
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    79690
Absorption 0.1% (=1 g/l)    1.156,   assuming all pairs of CYS residues form cystines

Ext. coefficient    79190
Absorption 0.1% (=1 g/l)    1.148,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.98, 32.54, 16.67]

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:59.8889
Grand average of hydropathicity (GRAVY):-0.54